水分迁移对水泥基材料后续水化与微结构的影响
作者:
作者单位:

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

作者简介:

刘亚州(1991—),男,山东菏泽人,石家庄铁道大学讲师,硕士生导师,博士.E-mail:liuyazhou@stdu.edu.cn

通讯作者:

孔丽娟(1981—),女,河北邯郸人,石家庄铁道大学教授,博士生导师,博士.E-mail:klj@stdu.edu.cn

中图分类号:

TU528.35

基金项目:

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)


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

1.School of Materials and Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;2.Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

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    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.

    Abstract:

    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.

    图1 试件切割示意图Fig.1 Cutting schematic diagram of specimen
    图2 不同养护制度下水泥基材料结合水量测定结果Fig.2 Determination results of amount of combined water in cement-based materials under different curing regimes
    图3 不同水中水化温度下水泥基材料结合水量测定结果Fig.3 Determination results of amount of combined water in cement-based materials under different hydration temperatures of water
    图4 不同影响因素下水泥基材料后续水化结合水量随后续水化时间变化曲线Fig.4 Variation curves of amount of combined water in cement-based material for further hydration with further hydration time under different influence factors
    图5 不同水中水化温度下水泥基材料的微观形貌Fig.5 Micro-morphologies of cement-based materials under different hydration temperatures of water
    图6 不同水中水化温度下水泥基材料孔结构对比结果Fig.6 Comparison results of pore structure of cement-based materials under different hydration temperatures of water
    表 1 水泥的化学组成Table 1 Chemical composition(by mass) of cement
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引用本文

刘亚州,魏策策,王磊,唐洲洋,孔丽娟.水分迁移对水泥基材料后续水化与微结构的影响[J].建筑材料学报,2024,27(11):1033-1038

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  • 收稿日期:2023-09-18
  • 最后修改日期:2024-04-18
  • 在线发布日期: 2024-12-10
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