摘要
为了研究高温循环作用下水泥基材料的力学特性,对经高温循环作用后的水泥砂浆试件进行了单轴压缩变形试验。研究结果表明:当循环次数为5次以内时,水泥砂浆的抗压强度随着高温循环次数的增加呈波动变化,无明显增大或减小趋势,但随温度和水灰比的增大而减小;在400℃以内,温度对水泥砂浆的峰值应变影响较小,但峰值应变随着高温循环次数的增加而增大;水泥砂浆的弹性模量随着高温循环次数的增加呈先增大后减小的变化规律。
In order to study the mechanical properties of cement mortar after high temperature cycles, uniaxial compression tests on cement mortar specimens after high temperature cycles were carried out. The resuhs show that the compressive strength of cement mortar decreases with the increasing of cycling times, temperature and water/cement ratio. The impact of temperature on the strain at the peak stress is light when the temperature is smaller than 400℃. The strain at the peak stress of cement mortar increases with the increasing of cycling times and water/cement ratio. The elastic modulus of cement mortar will increase first and then decrease with the increasing of cycling times and water/cement ratio, but will decrease first and then increase with the increasing of temperature.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2016年第7期2314-2317,共4页
Bulletin of the Chinese Ceramic Society
基金
宁波大学SRIP科研项目
关键词
水泥砂浆
高温循环
力学特性
cement mortar
high-temperature cycle
mechanical property
