CONSTRUCTION 2.2020 CPT PRINTING worldwide TECHNOLOGY www.cpt-worldwide.com MEDIA PARTNER GREEN WAY TO 3D PRINT 3D PRINTED CUSTOM BLOCK PAVEMENT AND OBJECTS INDUSTRIAL CONCRETE PRINTING SOFTWARE 3D PRINTED STAIR MOLDS 2002_cpt_c1-4.indd 1 06.05.20 21:05 3D printed homes page for homeless in Austin Bedroom, bath, kitchen, living room and large porch 60 © www.iconbuild.com 2002_cpt_c1-4.indd 2 06.05.20 21:05 EDITORIAL GLOBAL TRENDS AND CREATIVE SOLUTIONS The whole world is holding its breath while the Corona pandemic is a!ecting our private lives and professional work in a completely unprecedented manner. However, we have no choice but to move on and plan for the future. We need to develop creative solutions in order to avoid further standstill as much as possible. During the past weeks and months, countless trade fairs and technical conferences in the construction sector had to be cancelled, and organizers are all facing the same ques- tion: should the events be postponed to a later date, or cancelled altogether? In some instances, both of these choices may be unsuitable, and a more innovative approach has to be considered. The organizers of Digital Concrete 2020, which under normal circumstances would have taken place at the beginning of July at Eindhoven University of Technology in the Netherlands, are setting a good example in this regard. This unique event is an absolute highlight for the global construction printing industry and a cancellation is certainly not an option. However, postponing the event to a later date is also close to impossible, considering that the participants would have to travel from all over the world, which at the moment is very di!icult to plan and organize. Consequently, an alternative solution will be implemented, which probably is the only sensible response to the situation: Digital Concrete 2020 will take place as a full online conference. The organizers simply reverted to modern technology to provide maximum value for their clients and partners. This creative approach is fitting for this cutting-edge technical event, as it perfectly well reflects the developments in 3D construction printing technology. Construction printing is at the forefront of tech- nical innovation, attracts an increasing international attention, and paves the path into the future of con- struction and manufacturing methods. On all continents, experts are dedicating their professional e!orts to this technology and contribute to the translation of an idea into a global trend. In the current edition of CPT Construction Printing Technology, we report on social housing projects in the USA and the construc- tion of medical facilities in China. We hope that you, dear readers, find inspiration in these projects, which were successfully completed with 3D printing technology. Without doubt, Contour Cra"ing belongs to the pioneers of concrete printing and we are pleased to pres- ent you with a comprehensive account of the company. Also discussed in this edition – a Russian company that is investigating the application of geopolymer concrete in 3D printing. With respect to research and development, we have included interesting technical papers by the Technical University of Dresden and the Danish Technological Institute. Despite the di!icult circumstances faced by us all, we are pleased to have delivered another edition of CPT Construction Printing Technology that is true to its aim of being at the forefront of the industry. Enjoy reading through the journal and stay healthy! Any further suggestions? Would you possibly like to publish in CPT? Please feel free to contact me anytime at [email protected] Dipl.-Ing. Mark Küppers, editor in chief 2.20 | 3 1_cpt_2002_03-05_Edi.indd 3 08.05.20 11:56 CONTENT 6 66 32 44 54 2.20 1_cpt_2002_03-05_Edi.indd 4 08.05.20 11:58 CONTENT NEWS 6 Contour Cra!ing Corporation will print 10 3D Concrete printing and other digital four low-income housing units in Los Angeles concrete construction technologies Los Angeles County Development Authority (LACDA) Award 2nd German Industry Seminar, October 28th, 2020, Dresden 8 Additive Manufacturing in Construction (AMC) – 11 Acciona launches global 3D printing center in Dubai The challenge of large scale Culmination of an internal development process DFG funds new CRC/Transregio at TU Braunschweig 11 Unlocking new potential in collaboration with Technical University of Munich New partnership 9 Digital Concrete 2020 12 Exclusively designed furniture Full online conference More than just an eye catcher RESEARCH & DEVELOPMENT 14 CONPrint3D On-site, large-scale, monolithic 3D concrete printing 23 Towards sustainable 3D Concrete Printing Next Generation 3D-printed Concrete Structures (N3XTCON) MATERIALS 32 Green Way to 3D Print Geopolymer concrete 37 Partnership to develop printable concrete Specially formulated concrete DIGITAL PLANNING 38 Industrial concrete printing so!ware Specifically designed to assist research and industry PRODUCTION & APPLICATION PROJECTS 42 3D concrete printing with an industrial robotic arm 60 3D printed homes for homeless in Austin Next step towards digital project implementation Bedroom, bath, kitchen, living room and large porch 44 3D printed stair molds 64 3D printed isolation houses Reach new design heights Case studies 48 Contour Cra!ing: A revolutionary platform technology 66 Live 3D construction printing of a small house Pioneer of construction 3D printing In front of thousands of visitors 54 3D printed custom block pavement and objects New approach 58 Robots bring the idea from birth to realization 3D printing of buildings and production of non-standard concrete moulds 2.20 | 5 1_cpt_2002_03-05_Edi.indd 5 08.05.20 11:58 NEWS CONTOUR CRAFTING CORPORATION WILL PRINT FOUR LOW-INCOME HOUSING UNITS IN LOS ANGELES Los Angeles County Development Authority (LACDA) Award In an open competition, proposal solicitation (RFP NO. novative project will showcase the potential of the Contour LACDA19-125) and selection process, the Los Angeles Cra! ing technology in addressing the homelessness problem County Development Authority (LACDA) has awarded in Los Angeles and worldwide. The freedom in the architectur- Contour Cra! ing Corporation (CC Corp) a project on using al design and high degree of customization which is possible construction 3D printing for a" ordable housing. using CC Corp technologies will be utilized to create a livable, sustainable and vibrant community. CC Corp, in collaboration with the design firm HDR and the supportive services provider Volunteers of America Los Ange- In this project, CC Corp’s engineered printing mixture will be les (VOALA) is tasked with building four low-income housing used to print safe and durable houses. Various fresh and hard- units at a designated site in the Los Angeles County. This in- ened properties of the CC Corp’s printing mixtures have been 6 | 2.20 2_cpt_2002_06-13_News.indd 6 07.05.20 14:05 NEWS tested in order to provide conclusive data and assure the sat- content, and the result is a more sustainable and eco-friendly isfactory performance of the material. This mixture includes construction material. CC Corp is currently investigating the gravel, and therefore it is classified as concrete as opposed to use of supplementary cementitious materials to further re- mortar which is commonly used by many other construction duce the Portland cement content in its engineered printing 3D printing systems. mixture in order to further improve the sustainability of future printed buildings. Use of concrete for building these units is advantageous due to numerous technical, economical, and environmental con- Finally, during this project CC Corp and VOALA will organize siderations. From a technical standpoint, using gravel can im- a job training program. Multiple workshops and hands-on prove the dimensional stability of the hardened material, can training sessions will be held to educate local workers and reduce the risk of cracking in the structure, and can improve vulnerable population on practical aspects of the CC tech- the long-term durability of the printed structure. nology and to engage local workers in di# erent stages of this innovative construction project. From an economical viewpoint, inclusion of large aggregate in CC Corp’s printing mixture has made it possible to reduce the Portland cement content, which is the most expensive in- gredient of cementitious mixtures. Consequently, the cost of CC Corp’s printing material is very similar to the cost of tradi- tional concrete which has been used for decades. The third advantage of inclusion of large aggregates in Contour Cra! ing Corporation CC Corp’s printing mixture is reduction in the carbon footprint 215 South Douglas Street, El Segundo of the printed units. Production of Portland cement produc- Los Angeles, CA 90245, USA es significant amount of CO". Inclusion of gravel in the print- www.contourcra! ing.com ing mixture makes it possible to reduce the Portland cement CC Corp, in collaboration with the design firm HDR and the supportive services provider Volunteers of America Los Angeles (VOALA) is tasked with building four low-income housing units at a designated site in the Los Angeles County. 2.20 | 7 2_cpt_2002_06-13_News.indd 7 07.05.20 14:05 NEWS ADDITIVE MANUFACTURING IN CONSTRUCTION (AMC) – THE CHALLENGE OF LARGE SCALE DFG funds new CRC/Transregio at Technische Universität Braunschweig in collaboration with Technical University of Munich Additive Manufacturing (3D printing) is a new manufactur- The basic principles of Additive