周期性温变作用下水泥砂浆相对含冰量变化及其与抗压强度的相关性  

Changes of relative ice content of cement mortar under periodic temperature variations and its correlation with compressive strength

作　　者：王建省 宫经伟[1,2] WANG Jiansheng;GONG Jingwei(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention,Urumqi 830052,China;Xinjiang Xingnong Building Materials Testing Co.,Ltd.,Urumqi 830052,China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]新疆水利工程安全与水灾害防治重点实验室,新疆乌鲁木齐830052 [3]新疆兴农建筑材料检测有限公司,新疆乌鲁木齐830052

出　　处：《水利水电科技进展》2024年第6期34-40,共7页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金项目(51869031,51641906,51541909)。

摘　　要：为研究孔隙相对含冰量影响下的水泥砂浆力学性能演化规律,基于周期性温变作用下水泥砂浆的电阻率测试结果,计算并分析得到水泥砂浆相对含冰量时程变化规律,并利用PPR建模技术建立了不同相对含冰量影响下的相对抗压强度计算模型。结果表明:周期性温变作用下,水泥砂浆电阻率与相对含冰量呈现较强的相关性,建立的计算模型能较好地预测周期性温变作用下相对抗压强度随水泥砂浆的水胶比、饱和度、循环次数、最大相对含冰量的变化。To study the evolution law of the mechanical properties of cement mortar under the influence of the relative ice content in pores,based on the resistivity test results of cement mortar under periodic temperature variations,the time-history variation law of the relative ice content of cement mortar was calculated and analyzed.Using the PPR modeling technology,a calculation model for the relative compressive strength under the influence of different relative ice contents was established.The results show that under periodic temperature variations,the resistivity of cement mortar has a strong correlation with the relative ice content,and the established calculation model can effectively predict the changes in relative compressive strength with changes in the water-to-binder ratio,saturation,number of cycles,and maximum relative ice content of cement mortar under periodic temperature variations.

关 键 词：周期性温变 抗压强度 水泥砂浆 相对含冰量 PPR 

分 类 号：TV41[水利工程—水工结构工程]