掺聚丙烯纤维的高强混凝土高温性能研究

Study on the Properties of High Strength Concrete With Short Polypropylene Fiber after High Temperature

高强混凝土的渗透性很低 ,高温下可能出现爆裂破坏现象 ,严重影响混凝土及其内部钢筋的结构使用性能。本文通过改变聚丙烯纤维掺量 ,研究其改善高强混凝土高温爆裂性能 ,以及高温后高强混凝土吸水率。

With low penetration,the spalling of high strength concrete(HSC) at elevated temperatures which seriously affect the performance of reinforce concrete structure might occur.In this paper,the effect of spalling resistance of HSC mixed with different contents of polypropylene fiber were discussed.The ratio of water absorbing,the residual strength and the recovered performance of the HSC under fire attack were tested.