【摘要】 为了研究高低温循环作用后水泥砂浆的力学特性，对水泥砂浆试件先进行不同温度的高温循环作用，然后再对试件进行单轴压缩试验，研究高温循环次数、高温循环的温度对高温后试件的单轴抗压力学特性的影响。研究结果表明：(1)当经过相同温度的高温作用后，随着循环次数的增加，试件的单轴抗压强度呈逐渐减小的趋势，试件的峰值应变的变化规律则不固定。当经历高温循环的次数相同时，随着高温温度的增加，试件的抗压强度逐渐减小。(2)当试件的水灰比相同，试件经历3次不同温度的高温循环作用时，当第一次高温作用的温度相同时，随着第二次高温温度的增加，试件的单轴抗压强度呈逐渐减小的趋势，试件的峰值应变呈逐渐增加的趋势。更多还原

【Abstract】 In order to study the mechanical properties of cement mortar after high and low temperature cycling, the cement mortar specimens were subjected to high temperature cycling at different temperatures, and then subjected to uniaxial compression tests to study the effects of high temperature cycling times and temperature on the uniaxial compressive properties of the specimens after high temperature cycling. The research results indicate that:(1)After being subjected to high temperature at the same temperature, the uniaxial compressive strength of the specimen gradually decreases with the increase of the number of cycles, while the variation rule of the peak strain of the specimen is not fixed. When subjected to the same number of cycles of high temperature, the compressive strength of the specimen gradually decreases with the increase of high temperature.(2)When the water cement ratio of the specimen is the same and the specimen undergoes three high-temperature cycles at different temperatures, and the temperature of the first high-temperature is the same, the uniaxial compressive strength of the specimen gradually decreases with the increase of the second high-temperature temperature, and the peak strain of the specimen gradually increases.更多还原