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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-based materials under the effect of high temperature cycling, uniaxial compression deformation tests were carried out on the cement mortar samples after the high temperature cycle. The results show that when the number of cycles is less than 5, the compressive strength of cement mortar fluctuates with the increase of the number of high-temperature cycles, with no obvious increase or decrease. With the increase of temperature and water-cement ratio And the peak strain decreases with the increase of the number of high temperature cycles. The elastic modulus of cement mortar first increases with the increase of the number of high temperature cycles After the reduction of the law of change.