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Title |
Shear Bond Strength of 3D Printed Concrete Layers According to Water Cement Ratio and Printing Time Gap
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Authors |
김진호(Jin-Ho Kim) ; 이윤정(Yoon Jung Lee) ; 정호성(Hoseong Jeong) ; 김강수(Kang Su Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.6.199 |
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Abstract |
The extrudability of 3D printed concrete and its member strength can be highly influenced by water cement ratio (W/C) and printing time gap (PTG). In this study, mold cast specimens and 3D printed specimens were fabricated with variables of W/C ratio and PTG, and their shear bond strength and interlayer surface moisture content were measured and analyzed. The test results showed that the shear bond strength is greatly influenced by the amount of interlayer surface moisture. It is thus recommended that proper amount of interlayer surface moisture with respect to PTG needs to be maintained to have a required interlayer shear bond strength. In addition, further research is required to estimate the effect of many environmental factors that can influence the interlayer surface moisture content.
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