作　　者： ; ; ;

机构地区： 郑州大学

出　　处： 《混凝土》 2010年第4期71-73,共3页

摘　　要： 通过矿渣微粉纤维混凝土高温后抗折试验,分析了温度、矿渣微粉掺量、钢纤维体积率、聚丙烯纤维掺量和混凝土强度等级等因素对混凝土高温后抗折强度的影响。结果表明:随着温度升高,高温后矿渣微粉纤维混凝土的抗折强度和高温后与常温抗折强度比均不断降低;矿渣微粉、钢纤维和聚丙烯纤维的加入对高温后矿渣微粉纤维混凝土抗折强度有不同程度的影响。在试验研究的基础上,建立了考虑温度、矿渣微粉掺量、钢纤维体积率和聚丙烯纤维掺量共同影响的高温后矿渣微粉纤维混凝土抗折强度的计算模型,为纤维混凝土结构的抗火设计及灾后处理提供参考。 Through the experiment on flexural strength of fiber reinforced concrete with slag powder after the action of high temperature,the in-fluence of temperature,slag powder,fiber and concrete matrix strength grade on flexural strength of concrete was analyzed.The results shows that the flexural strength and the ratio of flexural strength after high temperature to room temperature decreases with the rising highest-temperature ex-posure to concrete.The slag power,steel fiber and polypropylene fiber can influence the flexural strength of concrete after high temperature in dif-ferent degree.Based on the experiments,the calculation model of the flexural strength of fiber reinforced concrete with slag powder after high tem-perature is founded,which considers the combined effect of temperature,slag powder,steel fiber and polypropylene fiber.It offer a reference of fire-resistant designing and fire maintaining of the fiber reinforced concrete structure.

关 键 词： 高温 矿渣微粉 纤维混凝土 抗折强度

领　　域： [建筑科学]