玄武岩纤维混凝土耐高温性能分析

对不同玄武岩纤维体积率混凝土进行室内高温试验,总结与分析了温度和纤维体积率对混凝土立方体抗压强度、劈裂抗拉强度和静弹性模量的影响规律。研究结果表明:玄武岩混凝土的抗压强度、抗拉强度和弹性模量均在200℃高温出现拐点,200℃高温后玄武岩纤维混凝土的力学性能均出现不同程度的降低;混凝土的力学性能随玄武岩纤维体积率的增大而呈现出先增大后减小的趋势,最优的玄武岩纤维体积率为0.15%;玄武岩再生混凝土的力学性能随再生骨料取代率的增大而减弱,再生骨料取代率不宜大于30%。

Analysis on High Temperature Resistance of Basalt Fiber Concrete

The indoor high temperature tests were carried out on concrete with different basalt fiber volume fractions.The effects of temperature and fiber volume fraction on the compressive strength,split tensile strength,and static elastic modulus of concrete cubes were summarized and analyzed.The results show that:The basalt of the recycled concrete compressive strength,tensile strength and elastic modulus are appeared inflection point of 200℃high temperature,high temperature 200℃after basalt fiber mechanical properties of concrete are different degrees of lower.The mechanical properties of concrete increase first and then decrease with the increase of basalt fiber volume ratio,and the optimal basalt fiber volume ratio is 0.15%.The mechanical properties of basalt recycled concrete decrease with the increase of the replacement rate of recycled aggregate,the replacement rate of recycled aggregate should not be greater than 30%.