不同侵蚀因素对水泥基材料水分传输的影响研究  

Study on the effect of different erosion factors on moisture transport of cementitious materials

作　　者：郝恩泽 温勇[1] 韩国旗 李宇航 刘佳 陈阳 HAO Enze;WEN Yong;HAN Guoqi;LI Yuhang;LIU Jia;CHEN Yang(College of Civil Engineering and Architecture,XinjiangUniversity,Urumqi 830047,China;College of Civil Engineering,Kashi University,Kashi 844006,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830047 [2]喀什大学土木工程学院,新疆喀什844006

出　　处：《混凝土》2024年第8期28-31,37,共5页Concrete

基　　金：国家自然科学基金(52168036);上海市工程结构安全重点实验室开放课题(2018-KF08);新疆维吾尔自治区天山青年计划项目(2018Q014);2021年自治区自然科学基金(2021D01B04)。

摘　　要：为探究不同因素对水泥基材料水分传输的影响,试验制作了3种不同水胶比的砂浆试件,对不同初始饱和度、不同浓度硫酸钠毛细吸水溶液以及不同硫酸钠侵蚀龄期试件的水分传输特征变化进行了试验研究。试验结果表明:水灰比越大,吸水量和吸水速率越大;试件的初始饱和度越高,吸水量越少,较低初始饱和度会提高水泥基材料的初始吸水系数;试件的总吸水量随硫酸钠溶液浓度的增大呈先增大后减小的趋势,2.5%与5%的硫酸钠溶液的吸水量大于纯水,7.5%与10%的硫酸钠溶液的吸水量小于纯水;受硫酸盐侵蚀后,试件的初始吸水系数总体呈增大趋势,总吸水量随侵蚀龄期的延长而增大。In order to explore the influence of different factors on the water transport of cement-based materials,three kinds of mortar specimens with different water-binder ratios were made.The water transport characteristics of specimens with different initial saturation,different concentration of sodium sulfate capillary water absorption solution and different sodium sulfate erosion ages were studied.The experimental results show that the higher the water-cement ratio,the higher the water absorption capacity and water absorption rate.The higher the initial saturation of the specimen,the less the water absorption,and the lower the initial saturation will increase the initial transmission rate of the cement-based material.With the increase of the concentration of sodium sulfate solution,the water absorption of 2.5%and 5%sodium sulfate solution was higher than that of pure water,and that of 7.5%and 10%sodium sulfate solution was lower than that of pure water.After sulfate erosion,the initial water absorption coefficient of the specimen increases,and the total water absorption increases with the extension of the erosion age.

关 键 词：水泥基材料 毛细吸水 累积吸水量 吸水系数 硫酸盐侵蚀 

分 类 号：TU528.01[建筑科学—建筑技术科学]