Additive Manufacturing in Construction
AMC TRR 277

Project A 01

Particle-Bed 3D Printing by Selective Cement Activation (SCA) – Sustainability, process enhancement and material models

The focus of this project is on particle-bed 3D printing (PB3DP) by Selective Cement Activation (SCA) with the aim to gain a fundamental understanding of the involved material-process interactions. In SCA a liquid is selectively applied on a dry particle-bed, consisting of fine aggregates and cement, so that the hydration reaction of the cement and thus the hardening only occurs locally. This process allows in particular the manufacturing of free formed elements with almost no restrictions in shape and topology.

Aim

The goal of this project is a fundamental understanding of the material-process interactions in particle-bed 3D printing by Selective Cement Activation. This is necessary to tailor both the material and the process to obtain the desired component properties.

Networking with other projects

TThe collaborations will specifically address the following aspects: The usage of RC material for SCA printing (A02), reinforcement integration (A05), computational modelling of the fluid intrusion into the particle-bed (B03), fracture analysis of hardened-state material (C01), shape optimisation of 3D printed elements (C02), sharing expert knowledge about SCA (C04), jointing principles (C05) and the evaluation of the ecological footprint of SCA printing (C09)

Project leaders

Prof. Dr.-Ing. Arno Kwade Prof. Dr.-Ing. Dirk Lowke

Contributors

M. Sc. Evelien Dorresteijn M. Sc. Friedrich Herding M. Sc. Niklas Meier Dr.-Ing. Harald Zetzener

Related Publications

Improving the dimensional accuracy in selective cement activation by w/c-ratio gradation BREUER X AM: Functional hybridisation in concrete building envelope elements through additive manufacturing Surfaces of coastal biogenic structures: exploiting advanced digital design and fabrication strategies for the manufacturing of oyster reef and mussel bed surrogates Experimental results for mechanical and thermal properties of SCA material Reduction of the cement content in Selective Cement Activation Effect of Grain Size and Layer Thickness on Hardened State Properties in Selective Cement Activation Particle-bed 3D printing by selective cement activation – Influence of process parameters on particle-bed density Influence of Material and Process Parameters on Hardened State Properties of Shotcrete 3D-Printed Elements Effect of Curing in Selective Cement Activation Fluid intrusion in powder beds for selective cement activation – an experimental and analytical study Material-process interactions in particle bed 3D printing and the underlying physics Evaluating the Effect of Methyl Cellulose on Hardened State Properties in Selective Cement Activation Material-process interactions in particle bed 3D printing and the underlying physics Fluid intrusion in powder beds for selective cement activation – An experimental and analytical study Particle bed 3D printing by selective cement activation – Applications, material and process technology

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