Particle-Bed 3D Printing by Selective Cement Paste Intrusion (SPI) - Particle Surface Functionalisation, Particle Synthesis and Integration of WAAM Reinforcement (A02)

• Subject Area: Construction Material Sciences, Chemistry, Building Physics ; Mechanical Process Engineering ; Production Automation and Assembly Technology
• Term: since 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 414265976

Selective paste intrusion (SPI) is a particle-bed-based additive manufacturing technology in which aggregates are spread in layerwise and bonded by the cement paste. To qualify SPI for structural concrete elements, reinforcement is implemented by using Wire and Arc Additive Manufacturing (WAAM). The project A02 aims to improve the sustainability and the construction speed of the combined SPI + WAAM process. Three tasks were identified to achieve this goal: reducing the ecological impact of the materials (aggregates, cement paste) used in the SPI process, accelerating the WAAM process by integrating stud welding, and in-depth-studying the influence of parameter and material adaptions on component properties.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 277: Additive Manufacturing in Construction (AMC) – The Opportunity for Large Impact
• Applicant Institution: Technische Universität Braunschweig
• Project Heads: Professor Dr.-Ing. Christoph Gehlen; Professor Dr.-Ing. Arno Kwade; Professor Dr.-Ing. Michael Friedrich Zäh