水分迁移对水泥基材料后续水化与微结构的影响  

Influence of Moisture Migration on Further Hydration and Microstructure of Cement-Based Materials

作　　者：刘亚州 魏策策 王磊 唐洲洋 孔丽娟 LIU Yazhou;WEI Cece;WANG Lei;TANG Zhouyang;KONG Lijuan(School of Materials and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学材料科学与工程学院,河北石家庄050043 [2]石家庄铁道大学河北省交通工程与环境协同发展新材料重点实验室,河北石家庄050043

出　　处：《建筑材料学报》2024年第11期1033-1038,共6页Journal of Building Materials

基　　金：河北省高等学校科学技术研究项目(QN2023087);中央引导地方科技发展资金资助项目(216Z3801G)。

摘　　要：通过后续水化试验,研究了不同养护制度和水中水化温度下水泥基材料的水分迁移规律,分析了水分迁移对水泥基材料后续水化与微结构的影响.结果表明:水泥基材料结合水量随试件深度增加呈减小趋势,后续水化35 d时,试件深度160 mm处的结合水量较深度0 mm处降低6.4%;试件深度80 mm处的后续水化结合水量(前期)随高温水浴养护时间延长呈减小趋势,随水中水化温度升高而增大;当水中水化温度过高(60℃)时,水泥基材料内部生成微裂缝,孔结构粗化,后续水化表现为损伤作用.A further hydration test was conducted to study the moisture migration laws of cement-based materials under different curing regimes and hydration temperatures of water.The influence of moisture migration on further hydration and microstructure of cement-based materials were analyzed.The results show that the amount of combined water in cement-based materials shows a tendency of decreasing with an increase in specimen depth.After further hydration for 35 d,the amount of combined water at the specimen depth of 160 mm is decreased by 6.4%compared with that at the depth of 0 mm.The amount of combined water for further hydration at the specimen depth of 80 mm during the early period displays a tendency of decreasing with an increase in high-temperature water-bath curing time,but its value increases with an increase in hydration temperature of water.When the hydration temperature of water is too high(60℃),microcracks are generated inside cement-based materials,and the pore structure is coarsened,and further hydration manifests as damage effect.

关 键 词：水分迁移 后续水化 养护制度 水中水化温度 结合水 微结构 

分 类 号：TU528.35[建筑科学—建筑技术科学]