硅酸盐学报

软水溶蚀环境中水泥–矿渣复合胶凝材料的浆体结构变化

作者：刘仍光1 2 张波1 阎培渝1

单位：1. 清华大学土木工程系土木工程安全与耐久教育部重点实验室北京 100084 2. 青岛农业大学建筑工程学院山东青岛 266109

分类号：

出版年,卷(期):页码：2013,41(11):1487-1492

DOI：

摘要：

利用压汞、X射线衍射、扫描电子显微镜和热重等方法研究了水泥–矿渣复合胶凝材料硬化浆体遭受软水溶蚀后的孔隙结构、水化产物、浆体形貌以及Ca(OH)2含量的变化，并研究了软水溶蚀作用下水泥–矿渣复合胶凝材料硬化浆体的微观结构变化规律。结果表明：水泥–矿渣复合胶凝材料硬化浆体经长期软水溶蚀作用后，浆体中的Ca(OH)2含量充足，C–S–H凝胶的Ca/Si比稍有降低，但没有分解的迹象；水泥–矿渣复合胶凝材料硬化浆体的孔隙率比纯水泥试样的低，浆体微观结构致密；矿渣掺量在70%以内的水泥–矿渣复合胶凝材料均表现出良好的抗溶蚀性能。

The pore structure, hydration products, microtopography and Ca(OH)2 content of hardened cement-slag complex binder pastes leached by soft water were investigated by means of mercury intrusion porosimetry, X-ray diffraction, scanning electron microscopy and thermogravimetry, respectively. The effect of soft water leaching on the microstructure of binder paste was discussed. The results show that the Ca(OH)2 content in pastes is abundant, and the Ca/Si ratio of C–S–H gel slightly decreases. But there is not the decomposition sign of C–S–H gel after prolonged leaching of soft water. The porosity of cement-slag complex binder pastes is lower, and their microstructure is more compact than that of pure cement paste, resulting in that the cement-slag complex binder containing slag of < 70% has a good leaching resistance.

基金项目：

：国家自然科学基金–广东省联合资助重点项目(No.U1134008)；国家自然科学基金面上项目(No.51278277)。

作者简介：

参考文献：

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