ICCX DIGITAL 365. Live-Days - Conference Program


November Live days – Conference program


04.11 / 08:30 - 09:30 CET
Opening Session - Keynote Speech

Robert Neubauer

Robert Neubauer
Austria Austria

Integrative Digitalization of the Construction Industry - a New Opportunity for Industrially Manufactured Precast Elements

04.11 / 09:30 CET
BIM & Concrete Products

04.11 / 12:30 CET
Ecology & Economy

04.11 / 15:00 CET
Markets Today and Tomorrow


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ICCX DIGITAL 365. - On demand

Conference program visible on ICCX digital 365.


Karen Scrivener

Prof. Dr. Karen Scrivener
Head of Laboratory of Construction Materials at Ecole Polytechnique Fédérale de Lausanne
ch Switzerland

The Future for Sustainable Cementitious Materials


Dr. Wolfram Schmidt
Federal Institute for Materials Research and Testing (BAM, Berlin) – Department Safety of Structures
de Germany

Co-moderator and expert in sustainable concrete solutions


Betonwaren und Nachbehandlung (Vorträge auf Deutsch / Presentations in German only!)


Hans Beushausen

Prof. Dr. Hans Beushausen
University of Cape Town, Department of Civil Engineering
za South Africa

Der Einfluss der Wärmehärtung auf die Dauerhaftigkeitseigenschaften von Betonfertigteilen


Digital Construction


Thomas Kirmayr

Dr. Thomas Kirmayr
Managing Director of Fraunhofer Building Innovation Alliance
Germany Germany

Digital construction – Fuel for the transformation process towards a sustainable circular economy

Alejandro López Vidal

Alejandro López Vidal
Technical Manager ANDECE
Spain Spain

Digitalization: from design to construction of precast concrete systems


Autoclaved Aerated Concrete - Sustainable building material


Volker Krick

Volker Krick
Sales manager - Wehrhahn
za Germany

How to cut AAC production costs

Faris Alwan

Faris Alwan
Head of Commercial & Business Development at Exeed Building Materials Industries


Build a Greener Future - The Use of AAC From a Producer’s Perspective

Jiafeng Yu

Jiafeng Yu
Process Technology Director of Keda Suremaker

China China

AAC production process problem analysis and the related solutions


Opening Session - Trends in concrete construction “Including a recorded Q&A Session”



J. Glaesle
Editor-in-Chief, opus C – Concrete Architecture & Design
de Germany

A perspective journey through contemporary precast concrete architecture

Boris Reyher

Dr. B. Reyher
Director Schlaich Bergermann und Partner

de Germany

Building with Infra-Lightweight Concrete - A Precast Solution

Hans Beushausen

Prof.-Dr. H. Beushausen
University of Cape Town, Department of Civil Engineering
South Africa South Africa

International developments aimed at increasing the sustainability of concrete


Dr. A. Minson
Concrete and Sustainable Construction Director, Global Cement and Concrete Association, UK
UK United Kingdom

Delivering a sustainable built environment: Concrete action by designers and producers


Americas-Session - All about precast “Including a recorded Q&A Session”



T. Hoff
P.E. American Concrete Pipe Association

Accelerated Precast Construction


D. McNutt
P.E. American Concrete Pipe Association

Manufacturing Methods – Reinforced Concrete Pipe

Manuel Lascarro

M.A. Lascarro
Executive Director, Colombian Chamber of Cement and Concrete PROCEMCO
be Colombia

Precast concrete industry in Latin America: Some developments


Autoclaved Aerated Concrete - Sustainable building material “Including a recorded Q&A Session”



Dr. C. Fudge
BSc DSc hon CEng FIStuctE FIMS
GB United Kingdom

AAC – Providing Sustainable Building Solutions


S. Malojer
Area Sales Manager at Progress Maschinen & Automation
de Italy

Customized reinforcement solutions for the AAC industry


R. Lackner
be Germany

BIM and AAC projects


3D Construction Printing - digitalisation in concrete construction “Including a recorded Q&A Session”


Lund Nielsen

H. Lund-Nielsen
MBA, Founder & GM, COBOD International A/S
Denmark Denmark

State of the Art of 3D printing of buildings and concrete structures

I. Comishin

I. Comishin
President, Twente Additive Manufacturing

Various applications examples and how 3DCP will change the concrete industry


V. Ruitinga
Founder Vertico 3D concrete printing
Netherlands The Netherlands

3D concrete printing vs. Precast

Alex Tuerk

A. Türk
CEO & Co-Founder, Aeditive GmbH
be Germany

3D Printing & Automation – Future Precast Manufacturing





Oliver Beckmann
R&D Engineer, Peikko Group
de Germany

Slim-floor composite beams in combination with hollow-core slabs in fire case


Christian Prilhofer
Prilhofer Consulting
de Germany

The Future of Automatic Production Plants


Stef Maas
Technical Director, FEBE
be Belgium

Historical development of Hollow Core slabs



Prof. Peter Mark
Ruhr-University Bochum
be Germany

Adaptive modular construction methods for serial production


Paul Schötzigk
Concrete technologist, Sonocrete
be Germany

Ultrasound assisted concrete production


Dr. Andreas Roye
de Germany

Digitization powered by light transmitting concrete


Eugene Korch
Institute of Façade Engineering
gb United Kingdom

Precast Facades for Compliance

Prefabrication – the future for builders, project developers, planners, architects, and entrepreneurs

Alongside the digital reorganisation of the construction and property industry using BIM and its sister field of prefabrication, the Gröner Group of companies is committed to achieving as neutral a carbon footprint as possible in its neighbourhood and project developments.

As a subsidiary of the Gröner Group, CG Elementum AG combines all real estate-relevant services in the areas of planning, construction and operation. The philosophy is a continuous linking of planning and construction processes ("Design2Construction") for all activities in the fields of new construction, renovation, revitalisation and conversion.

This means that prefabrication is a decisive part of CG Elementum's business model. A precast concrete production plant based on the basic ideas of Christoph Gröner started operations near Erfurt in January 2021. The next plant in Mülheim-Kärlich is already in the planning stage and will have even more prefabrication options available.

Christoph Gröner, Germany

With experience stretching back more than 25 years, Christoph Gröner consistently pursues his vision of future-oriented real estate developments as managing partner of the Gröner Group. The emphasis is on creating affordable and sustainable housing and living spaces.

As an entrepreneur and politically committed citizen, Christoph Gröner passionately and energetically takes on pressing social issues such as climate protection and the shortage of skilled workers.

One of his special concerns is equal opportunities for children. The association Wirtschaft kann Kinder e.V., initiated by him and Rüdiger Grube, is today one of the most important charitable organisations in Germany. Christoph Gröner is also a member of the board of trustees and a supporter of the Off Road Kids Stiftung and also supports a wide range of charitable organisations and projects.

Digital detection and sorting of faulty concrete products

Kortmann Beton is well-known throughout Germany for special solutions and elements made from concrete for residential dwellings, as well as precast civil engineering elements and paving blocks

One of two production lines was replaced over a period of four years (2015 until 2019) in several sections of varying sizes. At every stage, much care was taken to employ only the best available technology. For the first time in the world, the sorting bay was equipped with a sorting robot made by Kuka. This has made total digitalisation possible. The Hess block-making machine generates layer IDs, which it transmits via linked-in PLC control units through the Rekers dry side to the packaging machine. After packaging, the layer IDs turn into package IDs and are glued to packages by means of a label printer. These IDs make it possible to trace all data from the production – e.g. concerning the recipe, the machine settings on the block-maker, the blocks replaced by the robot or the reasons why a particular machine broke down.

The system enables the machine settings to be checked and optimised in a more rapid and professional way.

Parallel to this, the inventory control system based on MS-DOS had become out-of-date and so was replaced by complete new software made by Softbauware. This now also takes care of mould management, production planning for precast elements and both block-making machines besides processes in administration, such as product sales.

Henning Kortmann, B. A., Concrete Technologist

Henning Kortmann completed dual studies in operational systems management. He has additionally gained advanced professional certificates in the area of concrete technology. Kortmann possesses more than ten years professional experience at Kortmann Beton, his own family’s company. He has been managing partner since 2014 at this medium-sized company located in Schüttorf, Germany.

Automated masonry construction with robots

Cable robots are an innovative and promising approach as regards digitalisation and automation in masonry construction work. They additionally possess the potential of revolutionising masonry block processing as, by using them, greater volumes can be erected in a shorter time with the same or even reduced manning requirements. They can enhance productivity in construction companies and also make up for the lack of skilled employees. The interfaces between digital building model, robots and construction site processes play a crucial role in the practical implementation of digitalisation and automation in constructing with masonry. If people speak different languages, they cannot understand each other. It is no different with machines. They cannot communicate if the interfaces do not fit together. This paper provides an overview of the state of cable robot development for masonry construction.

Dr-Eng. Justus Lipowsky, Germany

Dr-Eng. Justus Lipowsky: from 10/1994 until 12/2001 Masters studies in process technology at Brandenburg University of Technology, Cottbus; 05/2002 until 09/2002 research associate at the Chair of Mechanical Process Engineering and Fluid Mechanics at Technical University Kaiserslautern; 10/2002 until 10/2009 research associate at the Chair of Mechanical Process Engineering of Martin Luther University (MLU) Halle-Wittenberg; from 03/2010 research associate at IAB – Weimar Institute of Applied Construction Research gGmbH specialising in particle simulation; 05/2013 doctorate at MLU Halle-Wittenberg on “Instationary Euler-Lagrange simulation of particle-laden swirl flows”; since 07/2015 head of the IAB Process Technology Research Department.

Smart board to enhance concrete block machines – new way for board characterization

Abilys® is a smart board (or pallet) equipped with sensors which can easily diagnose concrete block machine behaviour for purposes of curative or preventive maintenance. Abilys boards can be inserted into the machine without stopping production, and are able to check all stages of production, scanning each movement, vibration and defect, and recording over 400 bits of physical data per second in real time. Today, Cerib´s patented technology is proving its effectiveness on more than one hundred concrete block machines, cutting production waste by at least 4 % and achieving an average cycle time reduction of 1.7 seconds.

Dr. Kais Mehiri, France

Kais Mehiri has a Ph.D. in Materials Engineering. After two years of teaching at the National Engineering school of Metz, he joined the CERIB in 2009, where he currently heads the Innovation Process Department. CERIB is constantly involved in helping the precast concrete industry improve and optimise its manufacturing processes

BIM automation for box culvert and tank production

Current digital methods within the precast concrete industry are heavily user reliant, adding significant overhead to repetitive tasks such as modelling variations to standard products, producing the necessary general arrangement drawings for the client and creating cast unit drawings for manufacture. Parametric design of products can alleviate this overhead, allowing for job specific variations to be accounted for automatically within the limits of production capability. The implementation of parametric design can take many forms and include varying levels of sophistication. For example, the parametric design of a box culvert can include functionality for providing additional features to the square cross section, such as benching, dry weather flow channels and mammal ledges. This type of parametric design falls into the scope of most CAD software, allowing the user to program this capability through in-built user interfaces. However, more advanced parameterisation can be introduced using CAD Application Programming Interfaces (APIs). Using the Tekla Open API, FP McCann has created methods to parameterise not only individual products, but full systems of connected precast concrete units, such as culvert runs and stormwater attenuation tanks. The geometry of each individual unit is assigned from an optimisation algorithm, which is designed to meet the requirements specific to the job while maximising efficiencies in materials, manufacturing, transportation, handling and safety on site. Structural calculations for reinforcement design are linked to Tekla through the Open API, allowing for automatic creation of rebar geometries and subsequent export files for use in mesh machines and link benders in the factory. General arrangement drawings of the connected precast concrete units can be created in minutes, providing the client with 3D BIM quality geometries and giving project managers accurate estimates of unit numbers, weights and materials required. The introduction of the Tekla Open API has added the capability to integrate each stage of the design process into a seamless operation and allows for the use of complex optimisation techniques to maximise cost effectiveness.

Philip Crossett, England

Philip completed his PhD at Queen’s University of Belfast on the use of non-ferrous reinforcement in prestressed concrete before joining FP McCann as a Senior Structural Engineer in the Research & Development Department. Philip is now the Principle Engineer for box culvert structures after introducing automated design and modelling processes as part of an academic and industrial research partnership. Philip specializes in the application of optimized modelling and structural design for the manufacturing of precast concrete working alongside technical staff to improve productivity while reducing manual handling and lead times.

Future-oriented project InnoLiving – economically and ecologically optimised building

The talk will give an overview concerning the construction and functioning of the InnoLiving Project. Prefabricated concrete construction elements with a new prestressed floor design and a load-bearing concrete wall with vacuum insulation were utilised in constructing individual modules. The InnoLiving Project is composed of two modules positioned next to each other with an area of 6.0 x 10.0 m = 60.0 m2. The project’s speciality is that no running costs are incurred for the building. This new development features energy collected from the environment using concrete construction elements, stored in part in concrete construction elements and then distributed via the same.

Dipl.-Eng. Thomas Friedrich, Germany

Dipl.-Eng. Thomas Friedrich, Innogration GmbH, Bernkastel-Kues, studied civil engineering at RWTH Aachen University and at ETH Zurich with a scholarship from The German National Academic Foundation. His activities have included: project engineer at Stahlton/BBR, a prestressing company in Zurich; managing director of Domostatik, an engineering company he founded in 1988. From 2003 onwards, he has been engaged in developing a new type of prefabricated floor system with integrated technical building services. Proprietor of numerous patents for newly developed products in the construction sector, he founded Innogration GmbH in 2010 for the advanced development and marketing of this new multi-functional floor system; he is managing partner of Innogration GmbH. He has been lecturer at the special department of solid construction at Kaiserslautern University of Technology since 2008.

Re-thinking precast concrete construction with additive manufacturing technologies: lightweight, economical, sustainable

The special research area TRR 277 of the Technical Universities of Brunswick and Munich (TU Braunschweig and TU München) have established an interdisciplinary, collaborative research programme to fundamentally investigate additive manufacturing as a novel digital manufacturing technology for the construction industry. TRR 277 is following an original and integrated research approach, in which structural and conceptual design, material behaviour and production processes are considered as inseparable units. The presentation introduces the research programme TRR 277 and gives an insight into some of the ground-breaking scientific findings obtained to date. Additive manufacturing holds the potential to develop into a digital manufacturing technology that is adapted to the individual requirements of the construction industry. The integral coordination of structural and conceptual design, material technology and production processes allows to in future digitally print large-scale construction members, which are both light-weight and structurally stable, in a resource-efficient manner. In addition to offering efficient use of resources, additive manufacturing can contribute to increased productivity and the establishment of a new professional specialization in the construction industry.

Prof. Harald Kloft, Germany

Univ.-Prof. Dr.-Ing. Harald Kloft is civil engineer and since 2011, full professor and head of the Institute of Structural Design (ITE) as well as of the Digital Building Fabrication Laboratory (DBFL) at TU Braunschweig. His research is focused on designing resour ce-efficient innovative structures in context of digital fabrication processes. In close cooperation with an interdisciplinary research team he developed a new additive manufacturing (AM) technology, the so-called Shotcrete 3D Printing (SC3DP). Before TU Braunschweig, he taught as full professor for structural design at TU Kaiserslautern (2000 – 2011) and TU Graz, Austria (2007-2009).

From 2000 to 2008 he also taught as visiting professor for structural design at the Städelschule in Frankfurt/Main. Besides his academic background, Harald Kloft is co-founder and partner of the internationally operating engineering practice OSD – office for structural design (www.o-s-d.com), located in Frankfurt/Main in Germany.

Same language – different markets. Concrete pavers and precast concrete walls and ceilings in Germany and Austria

Everybody would like to have reliable market data – but almost nobody is capable of compiling such information. One Austrian market analysis has been involved for many years in gathering market data from data concerning production, customer groups and fields of application specifically for concrete paving blocks, walls and ceilings in Germany and Austria. It shows up differences but also similarities as well; inferences as regards future trends can be drawn from this market data.

Andreas Kreutzer, Austria

Andreas Kreutzer studied economics at Vienna University of Economics and Business and was active as marketing manager in the Austrian and German branded goods industry for six years. Since 1991, he has been managing director of BRANCHENRADAR.com Marktanalyse GmbH in Vienna; he also founded KREUTZER FISCHER & PARTNER, a network of consultants in Vienna-Berlin. His special areas are market analyses | market due diligence, case studies, strategy | business development, lectures | keynote speaking. His career has been characterised by decades of experience in very varied sectors: the construction material industry and branded goods industry, leisure industry, financial services and cooperations with public and institutional contracting parties, amongst others. Andreas Kreutzer is author of numerous economic commentaries in national and international print media.

The dangers of digitization in concrete plants and how to strategize protective measures

The industry-wide increase in networking poses significant security risks for concrete production plants. This has resulted in a review of IT security concepts. The competition between digitization and risk prevention requires transparency and the ability to act swiftly. Many like-minded companies and government authorities need to get an overview of the actual risks and threats in order to analyze where hackers have already exploited vulnerabilities in the system, and to detect additional risks for their networks and associated devices.

However, the concern does is not only relate to the quantity of increasing cyber-attacks on companies, but above all to the increased quality of hacker attacks. Advanced Persistent Threats (APT) are gaining momentum and create new challenges for cyber security in the concrete industry.

Peter Vahrenhorst, Germany

Peter Vahrenhorst is Chief Superintendent at the Criminal Investigation Office of North Rhine-Westphalia (NRW) in Germany. He is responsible for the prevention of cybercrime in the business sector. The tasks of the Cybercrime Competence Center include computer forensics, mobile forensics, investigations, monitoring of telephone tapping, open source research, prevention/media and the evaluation agency for child pornography. After studying at the University of Applied Sciences for Public Administration NRW, Peter Vahrenhorst initially worked as an IT investigator for 10 years. Subsequently, he was involved in the field of police prevention on the subject of the internet. For three years he was also a lecturer at Bielefeld University. Peter Vahrenhorst was awarded the "Cooperation Concrete" prize by the Ministry of Education NRW in 2009 and the State Prize for Internal Security by the Ministry of Home Affairs and Local Government NRW in 2010.

The Future for Sustainable Cementitious Materials

In this presentation I will explain the options for reducing CO2 from Cement and Concrete. Realistic options are determined by the composition of the earth and the basic chemistry of cements, whereby a mixture of grey powder and water becomes a hard solid. The highest potential for CO2 reduction comes from substituting half of CO2 intensive clinker with a combination of calcined clay and limestone – LC3 technology. There is further potential for CO2 reduction by more efficient use of cement in concrete and concrete in buildings.
Prof. Karen Scrivener, Head of Laboratory of Construction Materials at Ecole Polytechnique Fédérale de Lausanne, Switzerland
Karen Scrivener obtained her PhD at Imperial College in 1984. She worked for Lafarge in France for 6 years, before being appointed Professor and Head of the Laboratory of Construction Materials, at EPFL, Switzerland in 2001. In 2003 she founded the research network Nanocem bringing together the leading Industrial companies (Cement and admixtures) with European academic institute to do research on Cementitious Materials. Her research focusses on the understanding the chemistry and microstructure of cement based materials and improving their sustainability. In 2008, she came up with the idea for LC3 cement, this material has the potential to cut CO2 emissions related to cement by more than 400 million tonnes a year. She was made a fellow of the UK Royal Academy of Engineering in 2014.

Der Einfluss der Wärmehärtung auf die Dauerhaftigkeitseigenschaften von Betonfertigteilen

Art und Dauer der Nachbehandlung von Betonbauteilen waren in den vergangenen Jahren ein unter Entwurfsingenieuren und Fertigteilproduzenten viel diskutiertes Thema. Zur Beschleunigung der Frühfestigkeitsentwicklung erfolgt die Nachbehandlung oft unter erhöhten Temperaturen, wobei die benötigte Dauer der Nachbehandlung in der Regel mit dem Reifekonzept bestimmt wird. Diese Art der Wärmeerhärtung wird jedoch bisweilen mit einer gröberen Porenstruktur des Betons und somit mit einer verminderten Dauerhaftigkeit in Verbindung gebracht. Die eigentliche Auswirkung der Nachbehandlung auf die Dauerhaftigkeit von Betonbauteilen kann hierbei mit dem Konzept der äquivalenten Leistungsfähigkeit beurteilt werden. In dieser Präsentation werden die Einflüsse der Temperatur und der Dauer der Wärmebehandlung auf Betondauerhaftigkeitseigenschaften erläutert. Die Ergebnisse zeigen, dass in vielen Fällen die Nachbehandlung typischer Fertigteilbetone ohne negative Auswirkungen auf die Dauerhaftigkeit schon nach 24 Stunden beendet werden kann.
Prof. Dr. Hans Beushausen, University of Cape Town, Department of Civil Engineering
Prof. Dr. Hans Beushausen ist Professor für Baustoffkunde und konstruktiven Ingenieurbau und Leiter des Forschungsinstituts für Betonwerkstoffe an der Universität von Kapstadt (UCT), Südafrika. Er erwarb nach Abschluss seines Bauingenieurstudiums an der HAW Hamburg (Ende der 1990er) im Jahr 2000 seinen MSc an der UCT und promovierte dort 2005. Seine Forschungsinteressen gelten den Themen Betontechnologie, Dauerhaftigkeit und Lebensdauervorhersage von Betonbauwerken, sowie Betonsanierung. Seit 2004 ist er Redakteur für die BWI.

Wie nachhaltig sind Unterlagsplatten in der heutigen Zeit und welche Möglichkeiten gibt es?

CO2 Reduzierung, Nachhaltigkeit und Recyclingströme sind heute gängige Themen in allen Branchen. Dies betrifft die Nachhaltigkeit in Betonwerken als Ganzes, sowie aber auch viele kleine Teilbereiche. In meiner Präsentation möchte ich speziell auf den Bereich Unterlagsplatten in Betonsteinwerken eingehen und meinen aktuellen Wissenstand mit Ihnen teilen. Welche Möglichkeiten bieten sich aktuell und gibt es bereits Hersteller von Unterlagsplatten, welche sich vertieft mit der vorgenannten Thematik auseinandersetzen? Früher wurde sich bei größeren Investitionen meist zuerst die Frage gestellt, wie man bei einem neuen Produkt die Wirtschaftlichkeit berechnen kann und wie schnell sich die neue Investition bezahlt machen würde. Ob diese Vorgehensweise künftig noch einen großen Stellenwert haben wird, möchte ich gerne in Frage stellen und freue mich auf einen interessanten Dialog dazu.
Sönke Tunn, Fa. Sönke Tunn
Mit nunmehr fast 14 Jahren Erfahrung in der Betonindustrie und davon ca. 13 im Bereich von Unterlagsplatten für Betonsteinwerke, habe ich mich im Dezember 2020 in die Selbständigkeit begeben und mir die Nachhaltigkeit innerhalb der Branche zum Aushängeschild gemacht. Ich berate u.a. Kunden bei der Anschaffung neuer Unterlagsplatten und weise auf, welche Möglichkeiten es dazu aktuell gibt.

This email address is being protected from spambots. You need JavaScript enabled to view it.

Digital construction – Fuel for the transformation process towards a sustainable circular economy

The construction and real estate industry is undergoing a sustainable transformation process. Above all, the political and social objectives for climate neutrality and the circular economy are having a strong impact on the industry and its products. To make this successful, valid information and data are a key factor for more efficient processes and more prefabrication in new construction and renovation. New solutions must be linked to better implementation processes. Digital information is not only the fuel here, but is also growing into a product in its own right, enabling new opportunities and business models, but also raising questions and posing challenges. The lecture deals with the status quo in questions of digitization, but also with the perspective of where the construction industry must move towards. It will conclude with the question of implementation and, in particular, the acceleration of transformation processes using innovative experience labs.
Thomas Kirmayr, Managing Director of Fraunhofer Building Innovation Alliance, Germany
Thomas Kirmayr is Managing Director of the Fraunhofer Building Innovation Alliance and Head of the SME 4.0 Competence Centre Planning and Construction. His core competencies include business development and networks, BIM and digital design and construction, innovation and process management, innovative technical building equipment solutions as well as industrially manufactured building system solutions and modular construction. Thomas Kirmayr graduated with a degree in industrial engineering from TH Rosenheim and an executive MBA from RWTH Aachen University and the University of St. Gallen.

Digitalization: from design to construction of precast concrete systems

Alejandro López Vidal, Technical Manager ANDECE, Spain
Alejandro López Vidal, graduated in Industrial Engineering at the Universidad de León, Spain. He has performed some charges in ANDECE (Spanish Precast Concrete Association) since 2008, being chosen Technical Manager in 2013. He is member of several organizations related to precast concrete industry such as the Technical and Environmental Commissions of BIBM, two FIB commissions or being the Spanish Delegate within the CEN/TC 229. He also manages the first Spanish Master’s Degree of Precast Concrete Construction.

How to cut AAC production costs

Many AAC producers are facing vast price increases. Market conditions are driving up the production costs. It is worth taking a closer look at the production process to find hidden costs. Part of these costs can be reduced or even avoided, that is why we have made it our goal to continuously optimise and adapt our plant concepts. The impulse presentation highlights production influences, main cost drivers and presents general and individual solutions. How to cut the production costs and consequently boost the profit?
Volker Krick, Sales manager - Wehrhahn, Germany
Volker Krick has an electrical engineering background. He entered the AAC business in 1996 working for the #1 AAC manufacturer in the world. Being in charge of several AAC investment projects all over the world as well as acting as a CTO of 4 AAC production plants, he gained an outstanding and profound knowledge of the AAC production process – from the raw materials to the finished AAC products. Today, with over 21 years of experience in AAC, Volker Krick is working as International Sales Manager in the Wehrhahn team.

Build a Greener Future - The Use of AAC From a Producer’s Perspective

Nations worldwide have placed low-carbon and sustainable development strategies at the top of their agendas and are taking action to meet the ambitions of both the Paris Agreement and the United Nations 2030 Agenda for Sustainable Development, in line with the Global Goals

Buildings and building construction currently account for 39% of total CO₂ emissions, making it the largest contributing sector in the world in terms of greenhouse gas emissions. 11% of this figure is attributed to the embodied energy of building materials used in construction and the remaining 28% to building operations/materials in use. Additionally, 40% of global energy consumption, 40% of global natural resource degradation and up to 60% of annual waste sent to landfills, are all a result of the built environment and the construction of it.

Materials chosen for construction have a significant impact on the built environment and its whole life carbon footprint. Therefore, the selection and use of healthy, sustainable, energy-efficient building materials is essential in achieving a lower carbon future and environmentally sustainable development.

When compared to most other traditional building materials, Autoclaved Aerated Concrete’s lightweight nature, together with its numerous other advantageous characteristics, including low thermal conductivity, high resource efficiency and recyclability, offer a sustainable, high-impact solution for lowering not only greenhouse gas emissions, but also energy consumption, depletion of resources and waste.

Autoclaved Aerated Concrete facilitates superior masonry works, with unmatched speed, quality, and economy of construction. The contribution it can make to enhancing indoor comfort, improving indoor air quality, and delivering low carbon footprints throughout the life cycle of construction projects and completed buildings, call for AAC’s elevation and prioritization for use as the high-efficiency, value-added, green building solution it is globally proven to be.

To enable maximum contribution towards our global challenges, closer collaboration, and partnerships between private and public sector entities to explore and introduce appropriate regulations that govern and prioritize selection, specification and use of sustainable building materials based on performance related to cradle-to-grave environmental impact and health is essential.

The effects of global warming have become more prevalent in recent weeks, the fires in Turkey, Italy, Greece, North America, and floods in Germany and China, are more events that warn the climate crisis is reaching tipping point. What the world will look like 20 years from now, depends entirely on the actions we take today.

Faris Alwan, Head of Commercial & Business Development - Exeed Building Materials Industries, UAE

Faris Alwan is the Head of Commercial & Business Development at Exeed Building Materials Industries, where he has worked since 2017 in different capacities. He is responsible for promoting and expanding Exeed’s commercial activities both internally and externally to create long-term value for the organization as well as its customers, markets, and community. Faris studied Business Economics at the University of Hertfordshire, graduating with first class honours.

AAC production process problem analysis and the related solutions

In this presentation Jiafeng Yu will share his practical experience to solve process problems occurred during the AAC production process such as batching and pouring section, pre-curing section and autoclaving section, etc. Detailed approaches to solutions are presented and ways are shown to improve production processes in autoclaved aerated concrete manufacturing.
Jiafeng Yu, Process Technology Director of Keda Suremaker, China
Jiafeng Yu has rich experience and understanding in AAC industry production process and quality control, he is specialized in dealing with various challenging problems in AAC production process with 10 years practical experience. He is leading the Keda Suremaker process service team to provide process guidance and training service to more than 300 AAC plants worldwide. He is in charge of production process technology control of China National 13th Five-year Plan AAC project and participating in China AAC industry standardization work.

A perspective journey through contemporary precast concrete architecture

Hardly any other building material is in such demand by architects and is more diverse in use than concrete. This is once again reflected in contemporary architecture. The material that was mostly used previously for construction, has since become an architectural statement of the surface, that emphasises its message selfconfidently both visually and haptically. Concrete as a styling medium and design form of modern architecture is experiencing a true renaissance. Of course not just the aesthetes but also the technologists have taken on the material in the past few years. Concrete technological innovations and developments pave the way for a new exciting future. 3D-printing and divers digital methods, self-compacting and ultrahigh- performance concretes promise sculptural and filigree constructions and an architecture that could not be built in the past. Glass fiber and textile reinforced or even translucent concrete open up the range of possibilities that concrete architecture offers the planners nowadays. The presentation takes you on a rush journey through current and progressive precast concrete architecture around the globe.
Juergen Glaesle, Editor-in-chief of opus C, Germany
Dipl.-Ing. Juergen Glaesle studied structural engineering and architecture in Stuttgart/Germany and Leeds/England. After his studies he worked in various engineering offices in England and Germany. Since 2002 he has been a journalist in the concrete sector, since 2005 as the Editor-in-chief of the professional magazine “opus C – Architektur & Design mit Beton” (Concrete Architecture & Design) for the German-speaking architectural community.

Building with infra-lightweight concrete – A precast solution

Many architects love exposed concrete. However, in buildings intended for permanent human habitation, they encounter a particular challenge: monolithic facades made of normal concrete and lightweight concrete usually do not meet the high requirements for thermal insulation without thermal insulation. If a thermal insulation layer is installed on the facade, the concrete disappears behind it: No exposed concrete. Another disadvantage of such two-layer facade systems: Concrete is eminently recyclable, but only if it is free of all non-mineral constituents. Infra-lightweight concrete offers the monolithic solution. Infra-lightweight concrete is a high-performance concrete, which promises durable, sustainable and attractive buildings due to its low dry density as load-bearing thermal insulation. Monolithic structures made of exposed concrete can once again meet economic and ecological requirements. Infra-Lightweight concrete opens new ways to “Baukultur” and the design appropriate to the material. Several projects have been built successfully– now it’s time for precast.
Dr. B. Reyher, Director Schlaich Bergermann und Partner, Germany
Boris Reyher has been working as a Structural Engineer with sbp since 2007, where he has directed the Berlin office since 2010 and was appointed to Associate in 2014. Before that, he worked for Buro Happold in England, after finishing his doctoral thesis in numerical mechanics at the Technische Universität Berlin. He studied civil engineering at TU Berlin and the University of Michigan at Ann Arbor. His focus is on bridge construction as well as steel, concrete and membrane constructions for buildings, in particular research and application of infra-lightweight concrete.

International developments aimed at increasing the sustainability of concrete

Increasingly, sustainability is moving into the focus of international research on concrete technology. Among the most practically relevant current developments are those related to binder technology, the use of recycled fine and coarse aggregates, and durability design of concrete structures. The development of modern binder types involves substituting higher proportions of cement clinker with supplementary cementitious material. However, the current approach of using slag and fly ash is reaching its limits due to lack of sufficient and sustainable sources of these materials. Alternative low-CO2 and low-cost approaches are being investigated with the most promising strategy entailing the partial substitution of Portland cement clinker by the combined addition of calcined kaolinite clay and limestone. Concerning recycled aggregates, research into production methods and pre-treatment of aggregates is expected to significantly improve the technical properties of these materials and consequently increase their acceptance for industrial concrete manufacture. The presentation will discuss these developments and evaluate the expected impact on the production of precast concrete. In addition, it is argued that the superior durability properties of precast elements should be better utilized in the production and marketing of sustainable concrete.
Prof.-Dr. Hans Beushausen, Department of Civil Engineering, University of Cape Town, South Africa
Hans Beushausen is Professor in the Department of Civil Engineering at the University of Cape Town. He is a member of the Concrete Materials & Structural Integrity Research Unit, which focuses on infrastructure performance and renewal research. His research fields include concrete durability (material aspects, durability testing, durability design and specification), performance assessment of concrete structures, repair systems for concrete structures, and bonded concrete overlays. His interests further include precast concrete technology and he is editor of the magazine Concrete Plant International.

Delivering a sustainable built environment: Concrete action by designers and producers

The imperative of action on sustainability, with specific focus on climate change and biodiversity, is increasingly understood by all involved in the lifecycle of concrete. The members of the Global Cement and Concrete Association have made a climate ambition statement for carbon neutral concrete by 2050 and will launch a whole life cycle roadmap in late 2021. This builds on over 19% reductions in CO2 emissions since 1990, and recognises that the industry needs to accelerate action. The Roadmap will include a clear plan for linking the technologies, strategies, policies and levers required to achieve carbon neutral concrete by 2050. It takes a circular economy approach by taking into account emissions reduction in clinker, cement and concrete production, reduced demand through promoting design, material and construction efficiencies and improved standards and lifetime extension of whole concrete structures. The roadmap will require action by those who produce concrete and those who design with it..
Dr Andrew Minson, Concrete and Sustainable Construction Director, Global Cement and Concrete Association, UK
Andrew is originally from Australia and after graduation went to Oxford to do his doctorate. He worked for international engineering consultancy ARUP for 10 years working on projects around the world, before joining The Concrete Centre in the UK. He is now GCCA Director of Concrete and Sustainable Construction, and responsible for the GCCA Roadmap Process for Carbon Neutral Concrete by 2050.

Accelerated Precast Construction

Accelerated Precast Construction (APC) is a concept intended to help Engineers and their clients finish major infrastructure projects in a short period of time using precast concrete drainage products. APC allows a contractor to replace an existing conventional bridge with precast boxes or pipe at an accelerated pace, often achieving completion in a matter of days rather than months. This course will provide the basics concepts as well as several case studies that display the wide range of possibilities of accelerated precast placement.
Trygve W. Hoff, P.E. American Concrete Pipe Association, USA
Tryg is the Northeast Region Engineer for the American Concrete Pipe Association (ACPA). Tryg graduated with a BS in Civil Engineering from The Ohio State University and his professional experience ranges from environmental consulting in Ohio, to architectural engineering in beautiful Lake Tahoe, California. Tryg lives near Madison, Virginia, at the edge of the Blue Ridge mountains with his wife, Brooks, on a small 40-acre horse farm. Tryg has been promoting resilient infrastructure with the ACPA since 2012.

Manufacturing Methods – Reinforced Concrete Pipe

This presentation will cover the basics of reinforced concrete pipe production. Information covered will include concrete mix designs, batching concrete, and pipe reinforcing cages. The discussion will then shift to discussing three manufacturing methods, Wet Cast production, Dry Cast vibratory method, and then the Dry Cast packerhead method. The presentation will end with a brief discussion on concrete curing.
Donald E. McNutt, P.E. American Concrete Pipe Association, USA
Don has over 35 years of experience in the precast industry as a quality control manager, production engineer, design engineer, engineering manager and chief operating officer. He holds a Bachelor of Science in Civil Engineering from The University of Cincinnati and is a licensed Professional Engineer in the state of Ohio. Don is the Great Lakes Region Engineer for the American Concrete Pipe Association.

CarbiCrete: The Cement-Free, Carbon-Negative Concrete Solution

Concrete is the most widely used substance on Earth after water. But it is, of course, made with cement. What is less known is that cement production is responsible for 8% of the world’s greenhouse gas emissions. CarbiCrete, a Montreal-based carbon removal technology company, has developed a way to make precast concrete products without using any cement, replacing it with an industrial by-product. What’s more, the patented process removes more CO2 than it emits, making it carbon-negative. The process can be implemented easily in any precast concrete plant, has lower material costs than cement-based concrete and better mechanical and durability properties. CarbiCrete is licensing its technology to precast concrete makers.
Chris Stern, CEO of CarbiCrete, Canada
Chris Stern is the CEO of CarbiCrete, a carbon removal technology company that is commercializing a process to produce cement-free, carbon-negative concrete. He co-founded the firm in 2016. A mechanical engineer with 20 years’ experience in capex sales and business development in pharmaceutical packaging equipment, automotive machining and the entire solar manufacturing and deployment segment, Chris was a co-founder of Pure Energies, a residential solar power developer. In five years, Pure Energies grew into a firm with 200 employees in Toronto and San Francisco. In 2014, Pure was acquired by NRG Energy, after which Chris started a consulting business focusing on tech start-ups and strategy development in cleantech.

Precast concrete industry in Latin America: Some developments

In Latin America and the Caribbean, the traditional form of construction and the level of informality of the economy, has made the total percentage of cement consumed in industrial uses - such as ready-mix concrete or precast - relatively low compared to other parts of the world. In this presentation, the Ibero-American Federation of Ready-Mix Concrete will focus on analyzing the panorama of the precast concrete industry in the region and will comment on some of the specific initiatives that companies in the area have been working on for the positioning of technology in both housing and infrastructure construction.
Manuel Lascarro, Executive Director, Colombian Chamber of Cement and Concrete PROCEMCO
Manuel Lascarro has industrial engineer degree from the Pontificia Universidad Javeriana at Bogotá (Colombia) and he is also a Master in Management and Private Financing of Projects and Concessions from Centro Superior de Arquitectura-Universidad San Pablo CEU of Madrid (Spain). He has been linked to the cement and concrete sector for 25 years, currently being the Executive Director of the Ibero-American Federation of Ready-Mix Concrete and CEO of the Colombian Chamber of Cement and Concrete PROCEMCO where he has been working with the precast industry of the region. He is an Honorary Member of the Board of Directors of the National Ready Mixed Concrete Association of the USA and is one of the few Latin Americans who have been members of the Board of Directors of ASTM International, where he was awarded for his outstanding and sustained commitment to advance in the recognition of ASTM standards to improve the health, safety, quality, sustainability and economics of concrete construction in Latin America. Within his career, he has participated in different initiatives related to the industrialization, competitiveness and sustainability of the cement and concrete industries, including the creation of the Concrete Sustainability Council and its operation for the region. In his career, he has been a lecturer in more than 50 events held in the US, Europe, the Arab Emirates, Turkey, Singapore, China and in the vast majority of Latin American countries.

AAC – Providing Sustainable Building Solutions

AAC is a material of choice for sustainable construction. Strong but lightweight and easy-to-use, for outdoor and indoor purposes, it is made from naturally occurring materials that can be found in abundance. This presentation focuses on how AAC can be used to provide sustainable low energy homes and buildings, using the materials inherent properties of thermal insulation, airtightness, durability, fire resistance and thermal mass. AAC is used in many different formats from cavity to solid walls using masonry units and reinforced elements and components. Recent innovations include products that can be used to refurbish existing buildings. AAC can also make a positive contribution during its lifetime by taking CO2 out of the environment in use. In addition, the material has important characteristics associated with end of building life that can make a positive benefit to the Life Cycle Analysis and Circular Economy.
Dr Clifford Fudge BSc DSc hon CEng FIStuctE FIMS
Clifford Fudge is a Chartered Structural Engineer and was until recently Group Innovation Manager for H+H International AS (manufacturers of AAC masonry products), and Technical Director of H+H UK Limited overseeing R&D, technical support services and marketing. His current role is as Director of External Affairs. He is Vice President of EAACA, the European AAC Association, Chairman of the European Masonry Alliance and Past President of the International Masonry Society. His 38 years of service with H+H UK Limited has resulted in a wide- ranging experience with AAC masonry and precast concrete products, both in their design, production and their applications.

Customized reinforcement solutions for the AAC industry

Development and realization of innovative reinforcement solutions can be very beneficial for AAC producers. With various degrees of automation reinforcement machinery can be tailored to specific customer requirements. In addition to an overview of the different possibilities the presentation showcases a highly automated project.
Stephan Malojer, Area Sales Manager at Progress Maschinen & Automation, Italy
Stephan Malojer is international sales manager at Progress Machinery and Automation. His expertise is centered on reinforcement automation for the precast and AAC industry.

Design and Construction of Reinforced Autoclaved Aerated Concrete Buildings: From Seismic Resistance to Future Challenges

Autoclaved Aerated Concrete (AAC) is commonly used for infill walls of frame buildings. AAC is sometimes used in unreinforced masonry structures as load bearing elements, however the use of reinforced AAC panel products attract much less attention in this regard, since panels are mostly preferred for slabs and partitions in building construction. This study summarizes the results of the recent work conducted to investigate the seismic performance of reinforced AAC wall panel structures based on the seismic tests and dynamic simulations. The Turkish Earthquake Code (TEC) appears to be one of the few seismic codes placing emphasis on the seismic design of AAC buildings. Hence, the general design considerations of the AAC building design according to the TEC are summarized. A critical overview on future challenges for AAC is discussed in light of other building material alternatives and recent technologies such as concrete printing.
Prof. Dr. Baris Binici, Middle East Technical University, Turkey
Prof. Dr. Baris Binici obtained his B.Sc. Degree in Civil Engineering at Middle East Technical University and completed his M.Sc. and Ph.D. degrees from The University of Texas at Austin. He joined to Middle East Technical University as a faculty member in 2003. His research interests are in the area of structural and earthquake engineering, reinforced concrete design and modeling, seismic testing and simulations. He has over 200 international publications and worked as a consultant for seismic testing, analysis, and design of structures over 50 projects.

BIM and AAC projects

How can BIM help in AAC projects? This presentation shows a design to build workflow for an AAC project with the support of the BIM method. We will see how to exchange building models in an Open BIM project with the IFC-format or in a Closed BIM with the native Revit format. Split walls, floors and roofs into reinforced AAC panels. Perform the static calculation to get the reinforcement for each typical panel and generate reports for it. Create a site plan and a part list with each panel. Upload the site plan and the IFC-model with the panels to the cloud. Client can make a clash detection with this model and his own model and give approval for production. At the end we define the transport stacks of the panels according to the installation sequence.
Reinhard Lackner, CEO of IDAT GmbH, Germany
Reinhard Lackner studied computer science at the Technical University Vienna. Since 1990 he is CEO at the German based company IDAT where he is mainly responsible for the development of CAD/BIM and ERP software for the Precast Concrete and AAC Industry. He held several lessons about precast software at the Autodesk University in Las Vegas. He has a lot of experience in implementation of CAD/BIM software in design departments. Since 2016 he is part of the IFC4precast project group which defines a new model exchange standard for the precast industry under the head of the buildingSMART International.

State of the Art of 3D printing of buildings and concrete structures

The last years, the media has been filled with stories about new start-ups 3D printing an entire building in less than 1 day. The stories in the press have made the interest for 3D printing buildings explode with millions of downloads of the videos announced. The stories are fueling peoples hope for making buildings cheaper and for finally solving the need for affordable housing. More and more 3D printed buildings are popping up around the world and more and more precast plants are also starting to use the technology, but we have not yet seen a large scale application of the technology yet.

So what is the real truth here ? Can buildings be 3D printed in 24 hours ? Is it all just hype, but if so what makes a company like GE invest in the technology now ? Will 3D construction printing finally disrupt the construction sector and create all the new possibilities promised ?

Henrik Lund-Nielsen, MBA, Founder & General Manager, COBOD International A/S
Henrik Lund-Nielsen is the founder and General Manager of COBOD International A/S, a globally leading company within 3D construction printing constantly making headlines in the construction and 3D printing press. COBOD among others 3D printed The BOD, the first building in Europe in 2017, sold the largest 3D construction printer in the world with a length of 27 meters to The Middle East and delivered the printers that 3D printed the first two and three story buildings in Europe, in Belgium and Germany respectively. Recently COBOD entered into a long term collaboration agreement with GE Renewable Energy and LafargeHolcim (the world largest cement and concrete manufacturer) for the 3D printing of record tall concrete windmill towers. In 2015-17, as the project manager for a government supported project, Henrik Lund-Nielsen led a 3 years research project into the global State of the Art of 3D construction. Henrik Lund-Nielsen is a frequent speaker on 3D printing and 3D construction printing in particular, where in 2020 was recognized as one of the 10 most influential executives within the entire 3D printing industry.

Various applications examples and how 3DCP will change the concrete industry

Twente Additive Manufacturing was founded in November of 2018 by Tim Brodesser, Jonathan Ladouceur, Adam Rumjahn, Jim Ziemlanski and Ian Comishin. All of the founders are operationally involved on a daily basis. They set out to build a company from scratch with a few goals in mind. As strong believers in digital manufacturing they felt they could influence the architectural world by bringing more automation to the build site and the factories of construction element suppliers. Freeform design is loose term used by architects to describe elements that are comprised using arcs, curves and otherwise non-rectilinear shapes and surfaces. The conventional building processes used today often make freeform design cost-prohibitive to most housing projects. Buildings that have compound curves in their walls and landscape elements can be much more easily created with robust concrete 3D printing equipment. Until now, most cities and towns have been covered in generic rectangular buildings which Twente hopes to change to include more creative and expressive living spaces.
Ian Comishin, President
Ian is a self-taught automation enthusiast who has been working in CNC and other digital fabrication process for more than 20 years. He has fulfilled the role of Operations Director or President of many different companies. He has a long background in implementing industrial machinery into new industries.

3D concrete printing vs. Precast

What advantages can 3D concrete printing bring to the construction industry? Is it better to print on site or in the factory? And - will it replace precasting? These questions will be explored and answered in this presentation. The advantages of 3D printing are becoming ever more apparent and it is a billion dollar industry. Now printing is entering the built environment and we are beginning to see the first real business cases emerge. There is no doubt that its advantages in terms of single-piece production will be competitive, the question is where does its advantage end.
Volker Ruitinga, Founder Vertico 3D concrete printing
Volker has previous experience in the automative industry and is passionate about 3D printing. In 2017 he founded Vertico concrete printing after having helped develop the technology with a consortium of companies and like minded individuals.

3D Printing & Automation – Future Precast Manufacturing

Precast manufacturers have been at the forefront of innovation in the concrete industry for decades, centralizing production to benefit from economies of scale, productizing and innovating concrete modules, and systemizing and automating manufacturing processes to the extent possible. With the rise of digital technologies and the accelerated development of a broad field of automation technologies for any step in the manufacturing process, technology becomes a key differentiator. Therefore an urgent need arises to decide on strategic and product differentiation as well as to enable these strategic decisions by an adequate technology roadmap. In his contribution to ICCX, Aeditive’s Alex Tuerk explores the role of automation technology and 3D printing at this strategic crossroad of the precast industry.
Alexander Türk
Having advised global technology leaders for more than 7 years, Alex Tuerk thinks strategically on how technology shapes industries. In his role as CEO of Aeditive he is in charge of all strategic and commercial aspects of the Hamburg-based startup. Aeditive provides automation solutions based on its proprietary Robotic Shotcrete Printing process. Its customers are European precast manufacturers who plan to deploy the solution to a broad range of concrete elements.

Admixture selection criteria for robust casting of flowable concrete

Water reducing agents do have the capacity to significantly enhance process and materials robustness in modern concrete casting and help facilitating more environmentally friendly, and sustainable concrete mixture compositions. However, their use adds additional complexity to the casting process. To date, water reducing agents are widely used in the industry, but there is little understanding how differently modified plasticizers can be applied to tailor specific properties of flowable concrete and to enhance the robustness. The talk will present the most fundamental parameters that are relevant to understand how plasticizing admixtures function and offers easy to handle decision making tools to improve concrete performance according to specific casting processes and environmental frameworks.

Slim-floor composite beams in combination with hollow-core slabs in fire case

Peikko, a leading global supplier of concrete connections, composite structures, and wind energy applications, has carried out a series of fire tests with its DELTABEAM® slim-floor composite beam supporting hollow-core slabs. This webinar will give an overview of the background, results, and conclusions of this sophisticated research project.

When designing a slab system comprising Deltabeam composite beams and prestressed hollow-core slabs (HCS) for the event of a fire, neither of these products’ current European design codes or product approvals cover the special issues “change of direct support situation” and “flexible support on a beam”. These issues arise from their combination when the steel bottom flange of the composite beam is heated, and the supporting beam is heavily bending from thermal exposure.

To assess these issues, Peikko has carried out a test program of single HCS unit shear tests and system fire tests. The tests with Deltabeam and hollow-core slabs suggest there is no flexible shear issue in the event of fire if the beam deflections are within certain boundaries, and that the shifted direct support model with straight tie reinforcement is safe.

The Future of Automatic Production Plants

The year 2020 was difficult for all of us. Thankfully, the housing sector remained unaffected and everyone involved had a very good year economically. Looking ahead, what can we expect from the future? We know that forecasting the future is always difficult, but we want to try anyway. After the Corona crisis is overcome and the uncertainties regarding jobs are reduced, everything should be on the rise again. According to this logic, investments should be made now to be prepared for the future. But the question is how? Modernising the existing system or building a new one?

Actually, it's easy if you look at the right parameters. There is only one parameter that you can have an influence on. That is the efficiency of production, i.e. the man-hours per m². Other parameters such as the prices for cement, steel or energy cannot be influenced or can only be partly influenced. The same applies to sales prices. Therefore, the focus of modernisation must be placed on efficiency.

Historical development of Hollow Core slabs

The idea to reduce the self-weight of concrete slabs by putting voids in the centre of the cross-section, dates to the beginning of the previous century. Several inventors from different countries applied for patents on various systems. The presentation provides an analysis of patents published during the first half of the 20th century, and on experiences from 1960 on. Patents usually offer a complex description of inventions (claims). Reconstructing the history of hollow core slabs based on these patents is a laborious but fascinating exercise. The presentation aims to give a historical overview as a starting point for further discussions.

DFG Priority Programme SPP 2187: Adaptive modular construction methods for serial production

Sustainable construction has to meet a wide range of requirements. It is necessary to use materials, finances and labour sparingly, to manage construction sites such that they create little disruption to others, and to create durable structures with long service lives. The aim of the Focus Programme (SPP) 2187 "Adaptive modular construction methods for serial production" is to develop methods of serial production for precast concrete elements that enable the shortest possible construction time. For this purpose, structures are divided into similar modules, which are prefabricated and subsequently assembled on site. It is important to monitor the development of the modules and provide thorough quality assurance, in order to ensure that no single part is missing and that no post-processing is necessary. The installation follows the concept of the digital twin and mirrors the basic digital model of the structure.

The German Research Foundation (DFG) has been funding the SPP since 2020. The programme is planned to run for six years and brings together around 60 researchers from the disciplines of structural engineering, production technology, building informatics and mathematics. Cross-disciplinary thinking and development is required.

Ultrasound assisted concrete production

Sonocrete is developing a new and innovative concrete mixing system with the support of Ultrasound (US). Ultrasound is widely used in various technical processes (from pharmaceutics to ceramic and fuel industry) to disperse suspensions and to control crystallization processes. The application of US in concrete production is investigated by the authors in the recent past. For this purpose, two different concretes were prepared and investigated. With US the hydration of Portland cement can be accelerated effectively, which results in significant higher compressive strengths and improved fresh concrete properties at early ages. 28-day compressive strengths and chemical composition are not affected by applying US.

It is shown that ultrasound assisted concrete mixing leads to strongly accelerated concrete hardening and thus, paves the way for reduction of cement content or heat treatment.

Digitization powered by light transmitting concrete

Light transmitting concrete has been invented by a Canadian engineer in the 1930ies. In those days, the combination of liquid concrete with glass bottles allowed the creation of „light transmitting concrete“ for the first time in history.

LUCEM, has realized more then 400 projects worldwide using both, natural and artificial light sources. The gathered knowledge allows nowadays a future-like design of walls, floors, facades, furniture and even landscaping products such as illuminated concrete paving. Due to individual high-power LED control in combination with self-developed Apps and Cloud-based software, LUCEM can provide digital displays with robust concrete surfaces and a detailed low-resolution display at the same time.

Main applications at the moment are typically entrance areas with individualized content (such as „your room is on 3rd floor“) but will soon be found in public space design, when a line will show you the perfect parking space or the fastest way to the train.

Precast Facades for Compliance

The same appearance of the facade can be achieved by more than one method of construction. The decision on how to build depends on the clients objective. It is quicker to build tall buildings in prefabricated unitised-facades. Masonry or ventilated rain-screen facades are cost-effective for low-rises. However, there is one parameter that is almost always on the side of precast concrete facade. It is compliance. Precast could be the clearest route of proving the compliance with the normative base in the UK. In his talk Eugene will go through several precast concrete facade case studies. For these buildings acoustic, fire-safety and condensation risks were managed best by the precast concrete.