A 04

AMC — **Bildnachweis:** TRR277/TU Braunschweig

Integrated Additive Manufacturing Processes for Reinforced Shotcrete 3D Printing (SC3DP) Elements with Precise Surface Quality

Prof. Dr.-Ing. Harald Kloft, Project Leader
Prof. Dr.-Ing. Dirk Lowke, Project Leader
Prof. Dr.-Ing. Klaus Dröder, Project Leader

M. Sc. Eric Herrmann
Dr.-Ing. Abtin Baghdadi
M. Sc. Niklas Freund
M. Sc. Felipe Galli
Dr.-Ing. Inka Dreßler
M. Sc. Felix Gabriel
M. Sc. Robin Dörrie
B. Sc. Annahita Meshkini
Anja Stümmler

Summary of A 04

Within this project, basic research on various SC3DP strategies, materials, tools and methods will be conducted with regard to enhanced material and process control, reinforcement integration, surface quality and automation. To that end, different reinforcement materials in combination with suitable reinforcement manufacturing and integration concepts will be investigated based on force-flow optimised reinforcement alignment. Besides, design strategies as well as material and process control will be investigated in detail. Furthermore, tools and strategies for precise control of the surface quality and geometric resolution of SC3DP elements are subject of research. Finally, strategies, materials and tools elaborated within the project will be synergistically combined and validated at large scale.

AMC — **Bildnachweis:** TRR 277/TU Braunschweig

AMC — **Bildnachweis:** TRR 277 /TU Braunschweig

AMC — **Bildnachweis:** TRR 277/TU Braunschweig

AMC — **Bildnachweis:** TRR277/TU Braunschweig

Prof. Dr.-Ing. Harald Kloft

leads the scientific staff in the orientation and execution of the design process creation and supports them in an advisory capacity in the creation of test geometries and demonstrators. He is responsible for the content and organisational coordination of all work on the part of ITE.

ite(at)tu-bs.de

AMC — **Bildnachweis:** TRR277/TU Braunschweig

Prof. Dr.-Ing. Dirk Lowke

is head of the institute of building materials, concrete construction and fire protection, division of building materials. He will advise the scientific staff executing their work under consideration of the formulated project aims. He is responsible for the coordination and quality control of all work of iBMB.

d.lowke(at)ibmb.tu-bs.de

AMC — **Bildnachweis:** TRR277/TU Braunschweig

Prof. Dr.-Ing. Klaus Dröder

advises the scientific staff in continuous consideration of the defined research objectives and investigates opportunities to generate novel research projects and publications. He is responsible for the content and organisational coordination of all work on the part of IWF.

k.droeder(at)tu-braunschweig.de

AMC — **Bildnachweis:** TRR 277/TU Braunschweig

M. Sc. Eric Herrmann

e.herrmann(at)tu-braunschweig.de

AMC — **Bildnachweis:** TRR277/TU Braunschweig

Dr.-Ing. Abtin Baghdadi

a.baghdadi(at)tu-braunschweig.de

AMC — **Bildnachweis:** TRR 277 /TU Braunschweig

M. Sc. Niklas Freund

is a doctoral researcher for the duration of the research project. He will lead and organise the material development and testing program as well as the data evaluation and material modelling work within WG Lowke. Moreover, he will frequently publish the results achieved within the community.

n.Freund(at)ibmb.tu-bs.de

AMC — **Bildnachweis:** TRR277/TU Braunschweig

M. Sc. Felipe Galli

j.galli-geleilate(at)tu-braunschweig.de

AMC — **Bildnachweis:** TRR 277 /TU Braunschweig

Dr.-Ing. Inka Dreßler

i.dressler(at)ibmb.tu-bs.de

AMC — **Bildnachweis:** TRR277/TU Braunschweig

M. Sc. Felix Gabriel

f.gabriel(at)tu-braunschweig.de

AMC — **Bildnachweis:** TRR 277 /TU Braunschweig

M. Sc. Robin Dörrie

r.doerrie(at)tu-braunschweig.de

AMC — **Bildnachweis:** TRR277/TU Braunschweig

B. Sc. Annahita Meshkini

annahita.meshkini@tu-bs.de

AMC — **Bildnachweis:** TRR277/TU Braunschweig

Anja Stümmler

is an experienced technician in terms of machine control and maintenance of the DBFL. She is responsible for maintenance, repair and all modifications on the DBFL. She will also help to set up and execute experiments at the DBFL.

a.stuemmler(at)tu-bs.de

2020 | Freund, N.; Dressler, I.; Lowke, D.: Studying the Bond Properties of Vertical Integrated Short Reinforcement in the Shotcrete 3D Printing Process. RILEM Bookseries 28, pp. 612–621.

2020 | Dressler, I.; Freund, N.; Lowke, D.: Control of Stand Properties Produced with Shotcrete 3D Printing by Accelerator Dosage amd Process Parameters. RILEM Bookseries 28, pp. 42–52.

2020 | Kloft, Harald; Empelmann, Martin; Hack, Norman; Herrmann, Eric; Lowke, Dirk: Bewehrungsstrategien für den Beton‐3D‐Druck. In: Beton- und Stahlbetonbau. DOI: 10.1002/best.202000032

2020 |Kloft, Harald; Krauss, Hans-Werner; Hack, Norman; Herrmann, Eric; Neudecker, Stefan; Varady, Patrick A.; Lowke, Dirk: Influence of process parameters on the interlayer bond strength of concrete elements additive manufactured by Shotcrete 3D Printing (SC3DP). In: Cement and Concrete Research 134, S. 106078. DOI: 10.1016/j.cemconres.2020.106078

2018 | H.-W. Krauss, N. Nolte, H. Budelmann, H. Kloft, D. Lowke, “Concrete Additive Manufacturing – challenges and solutions illustrated by the SC3DP process”. In: 20. Ibausil, Weimar, 9 pp.

2018 | D. Lowke, “Thixotropy of SCC - A model descri- bing the effect of particle packing and superplasticizer adsorption on thixotropic structural build-up of the mortar phase based on interparticle interactions”, Cem. Con. Res., Vol. 104, pp. 94-104.

2018 | D. Lowke, et al., “Particle-bed 3D printing in concrete construction – possibilities and challenges“. Cem. Con. Res., Vol. 112, pp. 50-65.

2018 | N. Nolte, P. Varady, H.-W. Krauss, D. Lowke, “Schichtenverbund bei der additiven Fertigung – Einflussgrößen und Verfahrensvergleich“. In: 20. Ibausil, Weimar, 8 pp.

2018 | E. Herrmann, H. Lindemann, H. Kloft, “Entwicklung einer robotergestützten Spritzbetontechnologie zur schalungslosen generativen Fertigung komplexer Betonbauteile”. In: Proc. Spritzbeton-Tagung, Alpbach.

2018 | H. Kloft, et al., “Digital fabrication as chance for a “New Standard” in concrete design”. In: ICCDF 2018, Zürich.

2018 | H. Lindemann et al., “Development of a Shotcrete 3D-Printing (SC3DP) technology for additive manufacturing of reinforced freeform concrete structures”. In: ICCDF 2018, Zürich.

2017 | K. Dröder, et al., “Incremental manufacturing: Design aspects of flexible hybrid manufacturing cells for multi-scale production.” 7. WGP-Jahres- kongress, Aachen.

2016 | S. Neudecker, C. Bruns, R. Gerbers, J. Heyn, F. Dietrich, A. Raatz, H. Kloft, “A new robotic spray technology for generative manufacturing of com- plex concrete structures without formwork”. Proc. CIRP, Vol. 43, pp. 333-338.

2016 | K. Dröder, et al., “Partial additive manufacturing: experiments and prospects with regard to large series production,” Proc. CIRP, Vol. 55, pp. 122- 127.