A 02

Particle-Bed 3D Printing by Selective Cement Paste Intrusion (SPI) – Particle Surface Functionalisation, Particle Synthesis and Integration of WAAM Reinforcement

Prof. Dr.-Ing. Christoph Gehlen, Project leader
Prof. Dr.-Ing. Arno Kwade, Project leader
Prof. Dr.-Ing. Michael F. Zäh, Project leader

Dr.-Ing. Sandra Breitung-Faes
M. Sc. Leigh Duncan Hamilton
Dr.-Ing. Thomas Kränkel
M. Sc. Carla Matthäus
M. Sc. Felix Riegger
M. Sc. Alexander Straßer
M. Sc. Andeas Wimmer

Summary of A 02

Selective paste intrusion (SPI) is a particle-bed based additive manufacturing technology in which aggregates are spread in thin layers and bond by cement paste. To qualify SPI for structural concrete elements, the inclusion of reinforcement is mandatory. The innovation introduced here is that reinforcement will be implemented in the SPI process using Wire and Arc Additive Manufacturing (WAAM) simultaneously. Different active and passive cooling strategies, e.g. particle surface functionalisation and the synthesis of new particles, will be developed to deal with the high temperatures during WAAM.

Prof. Dr.-Ing. Christoph Gehlen

head of cbm and leads project A02. He instructs and advises the academic staff regarding
additive manufacturing and concrete technological questions. He is responsible for the coordination and
quality control of all work of cbm.

gehlen(at)tum.de

Prof. Dr.-Ing. Arno Kwade

head of iPAT and supports the academic staff regarding the conditioning of particle
products.

a.kwade(at)tu-bs.de

Prof. Dr.-Ing. Michael F. Zäh

head of iwb and supports the academic staff regarding additive manufacturing, alignment and
execution of numerical heat transport simulations, questions during validation and process development.

michael.zaeh(at)iwb.tum.de

M. Sc. Felix Riegger

is a research associate in the workgroup of Prof. Dr.-Ing. Michael F. Zäh.
As an expert in WAAM, he is responsible for the simulation and temperature modelling of the process.

felix.riegger(at)iwb.tum.de

Dr.-Ing. Sandra Breitung-Faes

is head of the division Powder and Slurry Processes and supports Prof. Kwade in
leading project A02. She instructs and supports the academic staff regarding powder grinding, size
classification and surface functionalisation.

s.breitung(at)tu-braunschweig.de

M. Sc. Leigh Duncan Hamilton

is a research associate in the work group of Prof. Dr.-Ing. Arno Kwade. He is responsible for the development of tailored particles for the combined process of SPI and WAAM.”

leigh-duncan.hamilton(at)tu-braunschweig.de

Dr. Thomas Kränkel

head of workgroup concrete technology and assists Prof. Gehlen in leading project A02.
He instructs and supports the academic staff regarding additive manufacturing and concrete technological
questions.

thomas.kraenkel(at)tum.de

M. Sc. Carla Matthäus

Expert in additive manufacturing, rheological questions and material development. She organizes the material development and material testing on behave of WG Gehlen.

c.matthaeus(at)tum.de

M.Sc. Alexander Straßer

is a research associate at the Workinggroup of Prof. Dr.-Ing. Christoph Gehlen. Responsible for research on selective paste intrusion and development of cement pastes.

alexander.strasser(at)tum.de

M. Sc. Andreas Wimmer

is head of the department additive manufacturing at the iwb and assists Prof. Zaeh in leading project A02 and A06. He instructs and supports the academic staff regarding LPBF and WAAM.

andreas.wimmer(at)iwb.tum.de

2021 | Weger, D.; Gehlen, C.: Particle-Bed Binding by Selective Paste Intrusion—Strength and Durability of Printed Fine-Grain Concrete Members. In: Materials 2021

, 14, 586. doi.org/10.3390/ma14030586

2020 | Weger, D.; Baier, D.; Straßer, A.; Prottung, S.; Kränkel, T.; Bachmann, A.; Gehlen, C.; Zäh, M.: Reinforced Particle-Bed Printing by Combination of the Selective Paste Intrusion Method with Wire and Arc Additive Manufacturing - A First Feasibility Study. In: RILEM International Conference on Concrete and Digital Fabrication.

2018 | Lowke, D.; Dini, E.; Perrot, A.; Weger, D.; Gehlen, C.; Dillenburger, B.: Particle-bed 3D printing in concrete construction – possibilities and challenges. In: Cem Conc Res 112.

2018 | Weger, D.; Lowke, D.; Gehlen, C.; Talke, D.; Henke, K.: Additive manufacturing of concrete elements using selective cement paste intrusion - Effect of layer orientation on strength and durability. In: Proc. of RILEM 1st Int. Conf. on Concrete and Digital Fabrication, Zurich.

2018 | Prziwara, P.; Breitung-Faes, S.; Kwade, A.: Impact of grinding aids on dry grinding performance, bulk properties and surface energy. In: Adv. Powder Technology 29.

2018 | Pierre, A.; Weger, D.; Perrot, A.; Lowke, D.: Penetration of cement pastes into sand packings during 3D printing: analytical and experimental study. In: Materials and Structures, 51:22.

2018 | Zeller, C.; Surendran, B.; Zaeh, M. F.: Parameterized Extended Finite Element Method for high thermal gradients. In: J. Comput. Des. Eng. 5(3).

2017 | Prziwara, P.; Breitung-Faes, S.; Kwade, A.: Aspects of Dry Fine Grinding with Stirred Media Mills: From Batch to Continuous Processes. In: Proc. of the Europ. Symp. on Comminution and Classification, Izmir.

2016 | Weger, D.; Lowke, D.; Gehlen, C.: 3D Printing of Concr. Struc. with Calcium Silicate based Cements using the Selective Binding Method - Effects of Concr. Techn. on Penetr. Depth of Cement Paste. In: Proc. of Hipermat, Kassel.

2014 | Krauss, H.; Zeugner, T.; Zaeh, M. F.: Layerwise Monitoring of the Selective Laser Melting Process by Thermography. In: Physics Proc. 56.

2011 | Zaeh, M. F.; Ott, M.: Investigations on heat regulation of AM-processes for metal structures. In: CIRP Annals-Manufacturing Techn. 60(1).