高温后钢纤维增强混凝土的空气渗透性试验研究  

Experimental Study on Air Permeability of Steel Fiber Reinforced Concrete After High Temperature

作　　者：何佳欢 韩阳[1] 沈雷[2] 陈家豪[1] 朱德 谭晗洋 HE Jia-huan;HAN Yang;SHEN Lei;CHEN Jia-hao;ZHU De;TAN Han-yang(School of Civil Engineering,Henan University of Technology,Zhengzhou 450001,China;College of Hydraulic Conservation and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河南工业大学土木工程学院,河南郑州450001 [2]河海大学水利水电学院,江苏南京210098

出　　处：《混凝土与水泥制品》2022年第4期50-54,共5页China Concrete and Cement Products

基　　金：中国博士后科学基金项目(2020T130170);国家自然科学基金项目(51908195)。

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。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.

关 键 词：高温 钢纤维增强混凝土 空气渗透系数 渗透深度 

分 类 号：TU528.572[建筑科学—建筑技术科学]