摘要
对普通混凝土(C20,C30,C40)模拟火灾发生的升温曲线进行了高温试验,加温后的混凝土试件静置6 h以上,进行超声波声时值、回弹值以及残余强度的测定,利用Excel进行了数据回归分析,分析结果表明,采用超声—回弹法评定高温后普通混凝土的残余强度是可行的,并且得出了评定高温后普通混凝土残余强度的回归公式。
Through the simulation fire occurred temperature-time curve, this article has carried on the concrete high-temperature test. After the fired concrete test sample maintained above 6 h, the ultrasonics peed value, the rebound value and the residual compressive strength value has been obtained. Through the date regression analysis using Excel, the result show that the method of ultrasonics and rebound is feasible and the formula evaluated the fired concrete remaining compressive strength has been obtained.
出处
《四川建筑科学研究》
北大核心
2007年第3期67-70,共4页
Sichuan Building Science
关键词
高温
普通混凝土
超声
回弹
回归分析
high-temperature
concrete
ultrasonics
rebound
regression analysis