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Choe, G., Kim, G., Kim, H., Hwang, E., Lee, S., Son, M., & Nam, J. (2020). Influence of amorphous metallic fibers on spalling properties of high-strength concrete exposed to high temperature. Construction and Building Materials, 263, 120711. | |||||
작성자 | 건설재료시공학연구실 | ||||
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조회수 | 160 | 등록일 | 2021.04.13 | ||
주저자 | GyeongcheolChoe | ||||
교신저자 | |||||
공동저자 | GyuyongKim,HongseopKim,EuichulHwang,SangkyuLee,MinjaeSon,JeongsooNam | ||||
학술지명 | Construction and Building Materials | ||||
AbstractThis study examined the effect of amorphous metallic (AM) fibers on the spalling properties of high-strength concrete. Nine specimens with concrete strengths of 100 MPa and 120 MPa were evaluated with mix proportions of polypropylene (PP) fibers of 0.15% and 0.25% by concrete volume, and proportions of AM fibers of 0.3% and 0.5% by concrete volume. These specimens were then heated in accordance with the ISO-834 heating curve. The movement of water vapor through a pore network formed by molten PP fibers was found to be a dominant factor controlling the spalling of high-strength concrete. Spalling control was not found to be significantly affected by the addition of 0.3% AM fibers; however, when 0.5% AM fibers was added, cracking was limited and so were paths for water vapor migration, increasing the likelihood of a moisture clog and creating the differential internal pressure often blamed for concrete spalling. |