ICCX Western Europe 2021 - Conference program


Digital Precast Building Concepts

3rd November 2021 / Opening Session

 09:30 Robert Neubauer
Managing Partner RIB SAA Software Engineering GmbH
Austria Austria Integrative Digitalization of the Construction Industry - a New Opportunity for Industrially Manufactured Precast Elements
 10:30 Round Table Discussion about the Future of Prefabrication
  • Robert Neubauer, Managing Partner RIB SAA Software Engineering GmbH and Co-founder of the working group „BIM for precast constructions“ as part of the Federal Association of Building Systems, representing the software and automation industry
  • Hermann Weckenmann, Managing Partner of Weckenmann Anlagentechnik GmbH & Co. KG and Vice Chairman of the Building Materials Plants Group in the VDMA, representing the mechanical and plant engineering industry
  • Prof. Peter Mark, Partner Ingenieurbüro Grassl, state-approved test engineer and expert in many fields of the construction industry, Chair of the Institute of Concrete Structures, Ruhr-Universität Bochum, as well as Representative of the DFG priority program “SPP2187 - Adaptive modularized constructions made in flux”, representing both science and practice
  • Moderater: Holger Karutz, Editor-in-Chief CPI Concrete Plant International
Sponsored presentations during the break in the exhibition are:   i theses logos

3rd November 2021 / Digital Building Tomorrow

 12:30 Prof. Peter Mark &
Dr. Patrick Forman
be Germany Fast construction with adaptive modular prefabrication
  Prof. Michael Eisfeld pl Germany Advantages and fields of application of BIM models in the production of precast elements
  Benno Strack pl Germany Model-based data exchange with IFC4precast – Status Quo
  Thomas Friedrich pl Germany Digitalisation of the production process
Sponsored presentations during the break in the exhibition are:   Ecoratio.    Wi SOLAR logo

3rd November 2021 / Concrete and Precast Technology

 15:30 Prof. Ludger Lohaus & Tobias Schack pl Germany Living architectural concrete with planned colour tone deviations
  Prof. Jürgen Oecknick & Michael Erhardt

pl Switzerland
ro Germany

Decorative precast concrete facades – the way from the material concept to the final solution
  Prof. Marc Sanabra de Spain Digitally Customized Hollow Core Slabs: Reducing Material Comsumption and Increasing Margins
ICCX evening event begins 19:00 with music band PRIME

4th November 2021 / BIM & Concrete Products

 09:30 Henning Kortmann pl Germany Digital detection and sorting of faulty concrete products
  Dr. Justus Lipowsky de Germany Automated masonry construction with robots
  Dr. Kais Mehiri pl France Smart board to enhance concrete block machines – new way for board characterization
  Philip Crossett england England BIM automation for box culvert and tank production
Sponsored presentations during the break in the exhibition are:   Kobra.       Logo Sika

4th November 2021 / Ecology & Economy

12:30  Thomas Friedrich ch Germany Future-oriented project InnoLiving – economically and ecologically optimised building
  Prof. Harald Kloft lv Germany Re-thinking precast concrete construction with additive manufacturing technologies: lightweight, economical, sustainable
Sponsored presentations during the break in the exhibition are:   Concrefy

4th November 2021 / Markets Today and Tomorrow

 15:00 Andreas Kreutzer ch Austria Same language – different markets.
Concrete pavers and precast concrete walls and ceilings in Germany and Austria
  Peter Vahrenhorst pl Germany The dangers of digitization in concrete plants and how to strategize protective measures





Fast construction with adaptive modular prefabrication

The Priority Programme 2187 “Adaptive modular construction concepts using production line methods – precise fast construction of the future” starts in January 2020 with a total running time of six years. It is multidisciplinary and was set up in 2018 by the Deutsche Forschungsgemeinschaft (DFG – German Research Foundation). Around 50 researchers from all over Germany are collaborating to build faster, more precisely and with less use of resources using prefabricated modules. The technical areas of structural engineering, production technology, civil engineering informatics and mathematics are represented.

Prof. Dr.-Ing. Peter Mark is University Professor of Structural Concrete at the Ruhr University Bochum. He also received a doctorate (1997) and qualified as a professor (2006) there and is the author or co-author of over 250 publications in the field of constructive civil engineering. In addition he is an inspection engineer for structural engineering, a consultant engineer and state-approved expert for the testing of structural stability. He has been coordinator of the Priority Programme 2187 since 2018.

Dr.-Ing. Patrick Forman is a research associate with the function of chief engineer at the Professorship of Structural Concrete at the Ruhr University Bochum. He received a doctorate there in 2016. His main research interests lie in structural optimisation and the mechanical calculation of lightweight concrete support structures. He has taken on the role of director in the newly set-up Priority Programme 2187.

Prof. Peter Mark, Germany

Advantages and fields of application with BIM models in manufacturing precast elements

Building Information Modelling has the potential of digitalising the entire value creation process in the construction industry. This contribution will demonstrate such potential as regards constructing with precast elements using first-hand case examples with industrial partners of Eisfeld Ingenieure AG, such as Xella and Goldbeck. The main focus will be on BIM application cases, in which a BIM model was employed in improving or automating work or production stages. With the latter, the main emphasis will be on connecting design engineering and production through BIM. This paper will introduce the following application cases as representative of the utilisation of BIM models in precast element construction work: deriving machine data from BIM models for manufacturing reinforcing for steel reinforced concrete construction elements; visualising reinforcement models by means of virtual reality for quality assurance and checks prior to manufacturing; deriving 3D geometrical data from BIM for wall elements made from Ytong including automated design engineering of their elements plus status and approval management using BIM models in constructing precast element halls. The contribution ends with an overview of other possible fields of application in precast element construction work that, in the author’s opinion, offer great potential for enhancing value creation.
Prof. Dr Eng. Michael Eisfeld studied civil engineering at RWTH Aachen University and structural engineering at Chalmers University in Gothenburg, before he composed his doctoral work at the Technical University of Dresden on the subject of knowledge-based structural design. He is professor of structural design and CAD at Bielefeld University of Applied Sciences and test engineer for structural engineering in the domain of solid construction. He has been majority shareholder in Eisfeld Ingenieure AG since 2005. The main focus of his work is the application of digital methods, such as Building Information Modelling and artificial intelligence, in planning and producing solid structures. He is consultant to various companies as regards BIM and was for several years head of the “Structural Design” expert group at buildingsmart e.V.

Prof. Dr Eng. Michael Eisfeld, Germany

Model-based data exchange with IFC4precast – Status Quo

IFC4precast is a completely new concept in the BIM process to provide the best possible support to the precast element industry, in particular. The digitalisation of the precast element industry is advancing in leaps and bounds; this means supporting the integration and networking of participating software systems, such as CAD, MES, PPS and ERP. Several well-known, capable software suppliers to this sector came together to found the buildingSMART working group IFC4precast (initiated by customers). Current developments with BIM are concentrated on documenting construction processes by enriching and standardising architectural and technical building models. Prefabrication processes are not anchored deeply enough in this development at the current time. IFC is already being utilised as a standard interchange format between architectural software systems. However, the information they contain is then lost in subsequent data exchange with the specialised precast element software systems (CAD, MES, PPS, ERP). Current interfaces between precast element CAD and MES are inflexible and can only be adapted to new requirements with very great difficulty. The project’s objective is to create an international, standardised interface that will be nurtured by the industry. As prefabricated products are becoming increasingly more complicated, there is a growing demand for a high-performance model data exchange interface.
Benno Strack completed his studies in mechanical engineering specialising in automation technology at Gelsenkirchen Technical College. He subsequently worked in differing leadership positions in the precast concrete element industry, including the companies BRAAS GmbH, Betonbau GmbH, Kronimus AG, imbau Industrielles Bauen GmbH as well as in the Brinkhege Group at fdu GmbH, STAAG Stahlbeton AG and bwb Beteiligungs-GmbH. He is the initiator of the standardisation of data models for the precast sector and spokesman for the “ifc4precast” working group in buildingSMART e.V. In addition, he has been an active member of the Association of German Engineers (VDI) for 30 years, amongst other things as long-standing chairman for construction engineering.

Benno Strack, Germany

Digitalisation of the production process

Advances in design engineering digitalisation have made a wealth of data available for further use. The challenge is to utilise this data optimally in production, quality assurance and documenting implementation. Plans and additional, networked details are available for implementation on mobile computers (tablets). Pictures of the details carried out and of the complete construction element can additionally be created during implementation and adjusted in each individual digital project space. This means that a design engineering facility located in another place can control implementation immediately, if needed provide information for amendments, and ultimately sign off the project. In this way, implementation can be monitored both in a precast element production facility and on a construction site. A check can be made, in particular, on the completeness and correct positioning of all inserts.
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.

Dipl.-Eng. Thomas Friedrich, Germany

Living architectural concrete with planned colour tone deviations

Constructing buildings with facing concrete is a favoured stylistic means in modern architecture. The preference in architects’ designs during the last decades was for smooth facing concrete areas with uniform colour hues. More recently, deviations in colour shades, which up to now mostly occurred undesired and unplanned as result of malfunctions, have been increasingly positively regarded as an architectural stylistic means and indeed desired as “Living (Architectural) Concrete”. As yet, experience and research results have been lacking as regards the planned, systematic, predictable creation of colour deviations rather than their chance occurrence. This paper will in the first place present findings which contribute to an understanding of the mechanisms involved in these deviations in colour shades coming to being. Based on small-scale laboratory trials, it will be explained how such deviations in colour can be generated in a targeted way. Building on this, the possibilities of producing precast elements with shades of “living” colour will be discussed.

Univ. Prof. Dr Eng. Ludger Lohaus studied civil engineering at Ruhr University, Bochum, where he also gained his doctorate. He was subsequently engaged at E. Heitkamp GmbH, a construction company, and headed the quality engineering department and the E & W concrete testing centre there. From 1998 until 2000, he was active as university professor for construction materials and solid structure design engineering at Ruhr University, Bochum. From 2001 to 2020, Ludger Lohaus has been director of the institute for construction materials at Leibniz University, Hanover. In this period he held a second function as scientific head of the Hanover testing institute for building materials and production engineering

Tobias Schack, M.Sc. studied civil and environmental engineering (B.Sc.) and structural engineering at Leibniz University, Hanover. He had previously completed training from 2007 to 2010 as tester of construction materials at Holcim Beton und Zuschlagstoffe GmbH. Tobias Schack has been engaged as research associate at the institute for construction materials at Leibniz University, Hanover since 2016.

Prof. Ludger Lohaus, Germany

Decorative precast concrete facades – the way from the material concept to the final solution

Architectural concrete from the precast plant is on the up and the inner-city area, residential- and social buildings are characterized more and more by prefabricated facades. As their basis, concrete continually impresses with its great changeability and adaptability in terms of form, colour and structure. However, only in rare cases it is possible to reconcile the desire for aesthetic appeal and technical perfection with the financial constraints that often dominate the business of precast concrete companies. In the long run, this challenge can only be overcome if close multidisciplinary ties exist between the the project phases of structural design, concrete technology, production and at-site assembling.

Whereas the designer will be responsible to deliver the necessary calculations, the concrete engineer must provide robust industrial mix-designs along with the database of possible early- and late restraint values to be expected in manufacturing and use of the precast concrete elements. Therefore, the concrete engineer is basically dealing with the material interactions, workability, strength development, colour and durability of the concrete, but he or she doesn`t know, how the assembled elements will resist to their movement, due to shrinkage (drying, autogeneous) and temperature impact over the entire lifetime of the façade. This challenge must be solved by the designer who is doing so in tight collaboration with the engineering company.

The plant is the third and not the least decisive player in the team of creating beautiful and sustainable concrete facades which must fulfil all requirements with regards to appearance, load bearing capacity and durability. Hence, the authors will be showing by real projects both working directions, shaping the interaction of constituent materials in decorative precast concrete, while dealing with a holistic multidisciplinary manufacturing process – from realizing the designed structure systems to mould making, concreting, surface treatment and finally getting the elements properly assembled at the construction site.

Prof. Dr. Jürgen Oecknickhas 40 years of professional experience in the international building materials industry and as a university lecturer on the subject of building materials process technology & marketing; he has experience in the manufacture and distribution of cement, ready-mix concrete and concrete products; Oecknick worked for Schwenk, Dornburger Zement, Holcim and others; he has special knowledge of the design and sales of construction cement, special binders, white and oil well cement.

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

Prof. Jürgen Oecknick, Switzerland

Dipl.-Ing. Michael Erhardt successfully completed a degree course in Civil Engineering at the University of Munich in 1999; after that he worked as a project manager in the field of architectural concrete, specialising in façades; since 2006 he has been Managing Partner Sales and Project Handling at Hemmerlein Ingenieurbau GmbH.

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

Dipl.-Ing. Michael Erhardt, Germany

Digitally Customized Hollow Core Slabs: Reducing Material Comsumption and Increasing Margins

The production of slabs with properly designed grooves on their top surface allows for the design of continuous floors, by embedding negative-moment-resistant reinforcement in the cast-in-situ topping: this is called Grooved Hollowcore. These floors can be up to a 25% thinner than conventional hollow core floors where the slabs are designed as simply supported. The slabs for these continuous floors consume a 25% less concrete, and are a 25% lighter. This new design system gives new added value to the slab, and allows the producer to significantly increase its margins. For an enhanced quality and cost-efficiency, the recommended solution is planned production of the slabs using digitally controlled machinery. Several leading machinery suppliers are currently able to offer the appropriate machinery to produce these highly efficient hollow core slabs.

Prof. Marc Sanabra-Loewe has been Professor for structural engineering for 11 years at the Polytechnic University in Barcelona, Spain (UPC - Barcelona Tech); and in 2018-2019 he was also Professor at the University of Illinois at Urbana-Champaign. He has been directing, for 15 years, MASA+Arquitectura, a structures design consultancy in Barcelona. Both his MSc and his PhD were devoted to optimizing precast concrete floors. He is the inventor of several patents of optimized precast floors systems, which are currently owned by Elastic Potential, S.L., a Spanish firm set to hold these patents.

Prof. Marc Sanabra, Spain

Digital mould management reduces maintenance and wear and brings more efficient production times

An important prerequisite in efficiently manufacturing optimum quality concrete products is an extensive, clearly-arranged pool of moulds whose management has been integrated into the overall operating system. Jasto Baustoffwerke was able to take a significant step forward last year with the introduction of software for digital mould management as this had been mainly carried out in past years using different Excel lists. All steel moulds needed for manufacturing different types of concrete products are registered precisely from the time of their ordering to their delivery, their utilisation, maintenance and repair cycles right up to their finally being taken out of service. The system is coupled with the block-making machine so that all cycle times are automatically stored in the mould account. The moulds are equipped with a chip or a barcode, thus enabling automatic detection. This facilitates retaining an overview, excluding confusions, and triggering new orders on time, in order to maintain production as trouble-free as possible.

Dr Johannes Schrenk: from 1994 active as head of R & D at Wolfgang Endress Kalk-und Schotterwerk (gräfix) in Gräfenberg (dry mortar industry). 1999: head of material development at Liapor (expanded clay manufacturer) in Hallerndorf-Pautzfeld, also responsible for application technology there in the areas of mortar, plasters and structural lightweight concrete. 2006: head of the masonry department at Meier Betonwerke in Lauterhofen, also responsible for developing, monitoring and producing concretes for manufacturing element floors, double walls and structural precast elements. 2011: technical director at Rotec GmbH (light aggregates) and Bisotherm GmbH (development and marketing of masonry blocks). Since September 2015, technical director at Jasto Baustoffwerke (manufacturing and marketing masonry blocks plus garden and landscaping products).

Active in the German Federal Association of the Lightweight Concrete Industry, Mortar Industry Association, German Society of Masonry Construction (DGfM), member of several standardisation committees. Numerous publications in various trade journals concerning construction materials and construction technology.

Dr Johannes Schrenk, Germany

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.

Henning Kortmann, 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: 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.

Dr-Eng. Justus Lipowsky, Germany

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.
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

Dr. Kais Mehiri, France

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 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.

Philip Crossett, England

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, 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.

Dipl.-Eng. Thomas Friedrich, Germany

Electrically-thermally activated roof tiles made of high performance lightweight concrete

Together with the RWTH Aachen University and the companies Autarq and noventec, a new type of hybrid concrete roof tile made of a high-performance fine-grained concrete was developed, prototyped and sampled, with which solar electric and solar thermal energy can be generated in addition to the protective function of the roof. In order to enable its use on the roofs of historical buildings, a corrugated roof tile was realized in the BMWI-sponsored joint project "Energy-efficient Margarethenhöhe Essen Monument Quarter", the shape and color of which was adapted to the S-shaped curved clay tiles used in a renovation project. It is also of practical importance that all laying and installation work can be carried out by the roofing trade. In addition, the total weight of the roof tile, including the integration of the PV laminate and heat exchanger, must not be higher than that of the original clay tile, so that the roof structure does not need to be upgraded. Ultimately, the hybrid concrete roof tile plays a central role in the overall energy concept of the historic buildings and the listed quarter. Finally, in the medium term, all suitable roof areas of the 800 settlement buildings are to be used to generate thermal and electrical energy with the hybrid concrete roof tiles.
Prof. Dr.-Ing. Harald Garrecht; 1985 diploma in civil engineering at the University of Karlsruhe; 1985 to 1992 research assistant at the Institute of Concrete Structures and Building Materials at the University of Karlsruhe; 1992 doctorate; 1992 to 1998 senior engineer in the department of building material technology at the above-mentioned institute; 1998 to 2006 professorship for building materials, building physics and building construction at the University of Applied Sciences Karlsruhe - Technology and Economics; 2006 to 2012 professorship at the Technical University of Darmstadt and head of the Department of Materials in Civil Engineering at the Institute for Concrete Structures; since April 2012 head of Institute of Construction Materials (IWB) of the University of Stuttgart and Managing Director of the Materials Testing Institute of the University of Stuttgart (MPA).

Prof. Harald Garrecht, Germany

The Möbius Tower – best practice from Belgium – BIM planing & BREEAM certification

The Möbius project consists two elliptical towers, the first with 21 floors and the second with 24 floors. The building is 98m high and located in the centre of Brussels. The core is cast on site and the structure of the towers is fully designed, calculated and prefabricated by Ergon. The challenge was to assemble the structure in only 6 days per floor. The construction of the first tower has been successfully completed and Ergon is currently in the process of supplying the elements of the second tower.

The structure is made up of prestressed beams with the shape of the letter “Z” to support the façade. The particularity of this beams is the variable section of overhang, which must follow the curvature of the elliptical façade. During the presentation, several connection details of beams with the façade and the floor will be shown. There are also some special prestressed beams inside of the building. Everything has been modeled in BIM, which made it possible to see all the connections in 3D and also to avoid errors during the production and the assembly on site.

Furthermore, the circular columns with corbels, the connection of beams and columns of the parking area which were made of high strength concrete and finally, prestressed slabs and several techniques to cover the maximum of the elliptical areas with prefabricated floor elements will be shown in the presentation.

Ir. Youssef Nait Boubker graduated as Civil engineer from the University Libre of Brussels in 2011, he worked with Ericsson as Site Engineer. Since August 2014 he worked as Project Engineer with Ergon – CRH group. Responsibilities: design, calculation, production of prefabricated concrete elements. Reference projects: Buildings: Möbius, Elite house, Brussels; Buzz-city, Luxemburg, etc.Industrial buildings: LIDL logistics centre, Marche-en-Famenne, IKEA, Mons; DESCO, Ans etc.In 2019 Möbius tower was nominated by FEBE – Belgium Concrete Federation for the “Outstanding Precast Award”.

Youssef Nait Boubker, Belgium

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.

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.

Prof. Harald Kloft, 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 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.

Andreas Kreutzer, Austria

Design of fasteners according to Eurocode 2, part 4 – the long way to implementation in Europe

The dimensioning of fastenings in concrete will in future be regulated and described in Part 4 of Eurocode 2 (EN 1992–4). The publication of EN 1992–4 in the spring of 2019 thus regulates for the first time the dimensioning of fastenings in concrete in a standard and not as was previously usually the case in guidelines or technical specifications. This is an important step of great moment in fastening technology.

The new standard combines the dimensioning of the most varied fastening systems and of differing actions in one central document. This is a crucial advantage, as the dimensioning of fastening agents in concrete had been scattered over numerous individual documents (see fig.1) in the past. EN 1992–4 contains both the dimensioning of inserted components (anchor channels and shear studs) as well as the dimensioning of retroactive fastenings (metal splay dowels, undercut anchors, concrete screws, bonded anchors and bonded splay dowels). The rules for dimensioning the most varied categories of action have been recorded in a common document and the dimensioning for static and quasi-static actions plus fatigue and earthquake stresses has been regulated. Dimensioning under exposure to fire can also be found in the new Part 4 of Eurocode 2. EN 1992-4 contains some opening clauses about the possibility of national regulations. Deviations to national regulations have only been defined in the case of earthquake stresses in the German national appendix to EN 1992-4.

Dr Eng Thomas M. Sippel completed his studies in civil engineering at the University of Stuttgart where he also gained his doctorate in 1996. From 1995 to 1998, he was managing director at Ingenieurbüro Eligehausen, Stuttgart, then, 1998 – 2004, managing partner at Ingenieurbüro Eligehausen & Sippel. Between 2004 and 2009, Dr Sippel headed Technical Sales Support, at fischerwerke, Waldachtal. He has been managing director of the European Engineered Construction Systems Association | ECS (formerly VBBF), Düsseldorf since 2009. Dr Sippel is also member of numerous national and international bodies (CEN, DIN, DAfStb, DIBt, fib, ISO) in the area of fastening and reinforcing technology. He has written more than 60 publications concerning fastening and anchoring technology, steel reinforced concrete and fibre composites.

Dr. Thomas Sippel, Germany

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 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.

Peter Vahrenhorst, Germany