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http://dx.doi.org/10.7734/COSEIK.2022.35.4.227

Strength Analysis of 3D Concrete Printed Mortar Prism Samples  

Kim, Sung-Jo (Department of Civil and Environmental Engineering, Yonsei University)
Bang, Gun-Woong (Department of Civil and Environmental Engineering, Yonsei University)
Han, Tong-Seok (Department of Civil and Environmental Engineering, Yonsei University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.35, no.4, 2022 , pp. 227-233 More about this Journal
Abstract
The 3D-printing technique is used for manufacturing objects by adding multiple layers, and it is relatively easy to manufacture objects with complex shapes. The 3D concrete printing technique, which incorporates 3D printing into the construction industry, does not use a formwork when placing concrete, and it requires less workload and labor, so economical construction is possible. However, 3D-printed concrete is expected to have a lower strength than that of molded concrete. In this study, the properties of 3D-printed concrete were analyzed. To fabricate the 3D-printed concrete samples, the extrusion path and shape of the samples were designed with Ultimaker Cura. Based on this, G-codes were generated to control the 3D printer. The optimal concrete mixing proportion was selected considering such factors as extrudability and buildability. Molded samples with the same dimensions were also fabricated for comparative analysis. The properties of each sample were measured through a three-point bending test and uniaxial compression test, and a comparative analysis was performed.
Keywords
3D concrete printing; extrusion path design; concrete properties; Ultimaker Cura; G-code;
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