何佳欢1,韩 阳1,沈 雷2,陈家豪1,朱 德1,谭晗洋1
何佳欢,韩阳,沈雷,等.高温后钢纤维增强混凝土的空气渗透性试验研究[J].混凝土与水泥制品,2022(4):50-54.
HE J H,HAN Y,SHEN L,et al.Experimental Study on Air Permeability of Steel Fiber Reinforced Concrete After High Temperature[J].China Concrete and Cement Products,2022(4):50-54.
高温后钢纤维增强混凝土的空气渗透性试验研究
何佳欢1,韩 阳1,沈 雷2,陈家豪1,朱 德1,谭晗洋1
何佳欢,韩阳,沈雷,等.高温后钢纤维增强混凝土的空气渗透性试验研究[J].混凝土与水泥制品,2022(4):50-54.
HE J H,HAN Y,SHEN L,et al.Experimental Study on Air Permeability of Steel Fiber Reinforced Concrete After High Temperature[J].China Concrete and Cement Products,2022(4):50-54.
摘 要:采用Torrent法研究了受热温度和钢纤维掺量对高强混凝土空气渗透系数和渗透深度的影响。结果表明:常温下,在高强混凝土中分别掺入体积分数为1%和2%的钢纤维后,试件的空气渗透系数分别降低了约76%和55%;在钢纤维掺量相同的情况下,随着受热温度的升高,试件的空气渗透系数和渗透深度均增大,150 ℃之后,空气渗透系数和渗透深度的增大趋势更加显著;钢纤维的掺入能够显著提升高强混凝土的抗渗性。
Abstract: The effects of heating temperature and steel fiber content on the air permeability coefficient and penetration depth of high-strength concrete were studied by the Torrent method. The results show that the air permeability coefficients of the specimens are reduced by about 76% and 55% respectively after adding steel fibers with a volume fraction of 1% and 2% into the high-strength concrete at room temperature. In the case of the same steel fiber content, with the increase of heating temperature, the air permeability coefficient and penetration depth of the specimen both increase, and the increase trend is more significant after 150 ℃. The incorporation of steel fiber can significantly improve the impermeability of high-strength concrete.
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