Extrusion-Based 3D Printing For Recyclable Gypsum

Lei Gong Tongji University
Yifan Zhou Fab-Union
Lang Zheng University College London
Philip F. Yuan* Tongji University

Gypsum is one of the most commonly used construction materials in cladding and non-load-bearing decoration. 3D printing technology has been involved in creating complex geometry. The particle-based method is a principal approach in 3D gypsum printing. However, the complex device and limited printable range limit the massive production of large-scale gypsum building components. This paper proposed a novel extrusion-based gypsum printing method and corresponding robotic fabrication workflow. First, several experiments are conducted to analyze the effect of different admixtures on the material setting properties. Second, a set-on-demand gypsum-based material is proposed by actively controlling multiple admixtures. Then, a process parameter-based robotic fabrication workflow is proposed, and a set of extrusion-based 3D gypsum printing hardware is developed. A curved gypsum panel sample is printed as experimental verification. By comparing to the particle-based method, The test sample shows that the extrusion-based method can effectively improve the production efficiency and reduce the production cost. Therefore, the proposed method gives a relatively efficient and cost-effective way to produce recyclable gypsum material massively as architectural elements.

Keywords: Extrusion-Based 3D Printing For Recyclable Gypsum

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