硅酸盐学报

矿物掺合料对水泥基材料孔溶液中氯离子浓聚的影响

作者：胡翔史才军李庆玲何宗旭何稳吕奎喜

单位：湖南大学土木工程学院长沙410082

分类号：TQ12

出版年,卷(期):页码：2015,43(4):0-0

DOI：

摘要：

研究了不同矿物掺合料掺量对水泥基材料孔溶液中氯离子浓聚系数的影响。结果表明：随着矿物掺合料掺量的增加，氯离子浓聚系数降低。在NaCl溶液中浸泡91 d后，除了矿粉取代量为20%的试件，其它掺入矿物掺合料硬化浆体试件的氯离子浓聚系数均低于纯硅酸盐水泥试件。随浸泡液NaCl浓度增大，氯离子浓聚系数显著降低。氯离子吸附能力与硬化水泥浆体内水化产物的特性和数量、Ca(OH)2含量和孔结构有关。

Chloride ion condensation index of hardened cement paste exposed to sodium chloride solutions with different concentrations were determined via pore solution expression. The influence of mineral admixtures content on the chloride ion condensation index in pore solution of concrete was investigated. The results show that the chloride ion condensation decreases with increasing the mineral admixtures content. The condensation index of specimens with mineral admixtures is lower than that without mineral admixtures, except with 20% slag replacement after 91-day soaking. The increase of chloride concentration in the exposed solution causes a significant reduction in condensation index. The chloride ion adsorption has a close relationship with hydration products, Ca(OH)2 content and pore structure in hardened cement pastes.

基金项目：

基金项目：国家自然科学基金(51378196，51072050)项目资助。

作者简介：

第一作者：胡翔(1989—)，男，硕士研究生。通信作者：史才军(1963—)，男，博士，教授。

参考文献：

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