纤维混凝土高温后力学性能的研究  

Mechanical properties of fiber reinforced concrete after high temperature

作　　者：高超[1] 杨鼎宜[1] 俞君宝[1] 王乐乐[1] 李鹏[1] 

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225009

出　　处：《混凝土》2013年第1期33-36,共4页Concrete

基　　金：国家重点基础研究发展计划资助(2009CB623200);国家"十二五"国家科技支撑计划(2012BAJ20B01-06)

摘　　要：阐述了混凝土高温力学性能研究现状及纤维混凝土的优良特性,揭示了纤维混凝土高温力学性能的研究意义。通过试验,揭示了纤维混凝土强度随温度变化规律,并分析了温度对纤维混凝土力学性能的影响机理。研究表明:低于200℃时,纤维混凝土抗压强度均有所增加;200℃后,抗压强度开始下降;高于400℃时,纤维混凝土抗压强度下降明显,但是下降的速度较素混凝土小得多。温度低于600℃时,钢纤维混凝土抗折强度下降十分缓慢;600℃时,钢纤维混凝土相对残余抗折强度值为81%,素混凝土已下降至59%。It described mechanical properties of concrete after high temperature and the excellent characteristics of fiber concrete, re vealed the significance of the high temperature mechanical properties of fiber reinforced concrete.The tests revealed fiber concrete strength variation at different temperatures, and analyzed the influence mechanism of temperature on fiber concrete mechanical properties.Studies have shown that：when the temperature was below 200 ℃, the compressive strength of fiber concrete was increased;when the temperature higher than 200 ℃, the compressive strength of concrete began to fall; temperature higher than 400 ℃, fiber concrete compressive strength was significantly decreased,but the rate of decline was much smaller than the plain concrete.When the temperature was below 600 ℃, the steel fiber reinforced concrete flexural strength decreased very slowly;At 600 ℃, steel fiber reinforced concrete relative residual flexural strength value of 81% ,while the plain concrete has fallen to 59%.

关 键 词：纤维混凝土 高温 抗压强度 抗折强度 

分 类 号：TU528.572[建筑科学—建筑技术科学]