强紫外线辐照下水泥砂浆的强度与干缩及水化性能  

The strength, shrinkage and hydration characteristics of cement mortar subjected to strong ultraviolet radiation

作　　者：刘名君[1] 王海旭 黎建波[3] 胡渊 龙广成[2] 曾晓辉[2] 戴胜勇[1] 邓勇灵 张志勇[1] LIU Mingjun;WANG Haixu;LI Jianbo;HU Yuan;LONG guangcheng;ZENG xiaohui;DAI Shengyong;DENG Yongling;ZHANG Zhiyong(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031;School of Civil Engineering,Central South University,Changsha 410075;China Railway No.8 Engineering Group Co.,Ltd.,Chengdu 610031)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031 [2]中南大学土木工程学院,湖南长沙410075 [3]中铁八局集团有限公司,四川成都610031

出　　处：《中国建材科技》2023年第1期30-37,共8页China Building Materials Science & Technology

基　　金：国家自然科学基金(11790283;52078490)。

摘　　要：为掌握紫外线辐照对水泥基材料力学强度、干缩变形及水化作用的影响规律,通过模拟试验,研究分析标准干缩环境、紫外线辐照环境等三种条件下不同组成水泥砂浆的强度、干缩变形、质量变化率及水化进程等参数变化。结果表明,强紫外线辐照对水泥砂浆的抗折、抗压强度存在不利影响,且随着紫外线辐照时间延长,不利影响越显著。同时,紫外线辐照作用显著增加砂浆试件的水分蒸发速率和干缩变形,而试件的水化程度呈下降趋势。In order to grasp the influence of ultraviolet radiation on the mechanical strength, shrinkage deformation and hydration of cement-based materials, three test conditions are designed, including the standard shrinkage test environment and the shrinkage test environment containing ultraviolet radiation. This study analyzes the changes of parameters such as the strength, shrinkage deformation, mass change rate and hydration process of cement mortars with different compositions under various conditions. The results show that strong ultraviolet radiation has an adverse effect on the flexural and compressive strength of cement mortar, and this adverse effect becomes more significant with the prolongation of ultraviolet radiation time. At the same time, the effect of ultraviolet radiation significantly increases the water evaporation rate and shrinkage deformation of the mortar specimens, while the degree of hydration of the specimens shows a decreasing trend.

关 键 词：强紫外线 水泥砂浆 强度 干燥收缩 水化作用 

分 类 号：TU528[建筑科学—建筑技术科学]