用超声波法评估纤维对混凝土的抗火作用  

Application of ultrasonic in evaluating fire-resistant performance of fiber reinforced concrete

作　　者：曾令军[1] 朱合华[1] 闫治国[1] 姚坚[1] 

机构地区：[1]同济大学,上海200092

出　　处：《中国建材科技》2006年第2期18-22,共5页China Building Materials Science & Technology

摘　　要：本文通过试验对普通混凝土、钢纤维混凝土和聚丙烯纤维混凝土高温后破坏状况进行了研究;利用超声波的原理,对加热后的3种混凝土分别进行超声波速检测,并用超声波速评价了各种纤维对混凝土抗火性能所产生的影响;提出了综合超声波速和混凝土表面状况来推断受火温度及损害程度的方法。In this oracle, the damage states of plain concrete, steel fibre reinforced concrete and polypropylene fibre reinforced concrete after exposure in the high temperature are researched. with the ultrasonic theory, the ultrasonic speed in three kinds of heated specimens are tested. Different influence of steel fiber and polypropylene fibre are analysied in this article. Some methods are provided rof estimating the damage degree and the remperature of fire disaster according to the ultrasonic speed and the surface state of heated concrete.

关 键 词：高温 混凝土 钢纤维 聚丙烯纤维 超声波 

分 类 号：TU528.1[建筑科学—建筑技术科学] TU528.572