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Title |
Flexural Behavior of Layered RC Slabs, which Bio-Mimics the Interface of Shell Layers, Produced by Using 3D Printable Highly Ductile Cement Composite
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Authors |
현창진(Chang-Jin Hyun) ; 권기성(Ki-Seong Kwon) ; 서지석(Ji-Seok Seo) ; 김윤용(Yun-Yong Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.1.90 |
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Keywords |
3D 프린팅; 연성; HDCC; 내력; PE-mesh 3D print; Ductility; HDCC; Load carrying capacity; PE-mesh |
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Abstract |
In this study, we employed Highly Ductile Cement Composite (HDCC) to evaluate the flexural performance of a RC slab that simulates the laminating structure of a seashell. To evaluate flexural performance, we produced conventional RC slab specimens, HDCC slab specimens, and HDCC-M slab specimens which biomimics a seashell's layered structure by inserting PE mesh inside the slab made of HDCC. A series of 4-point bending tests were conducted. Experimental results shows the flexural strength of the HDCC-M slab specimen was 1.7 times and 1.2 times higher than that of the RC and HDCC slab specimens, respectively. Furthermore, the ductility was evaluated using the ratio of yield deflection to maximum deflection, and it was confirmed that the HDCC slab test specimen exhibited the best ductility. This is most likely due to the fact that the inserted PE mesh separates the layers and increases ductility, while the HDCC passing through the mesh prevents the loss of load carrying capacity due to layer separation.
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