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 con- taining slag of〈 70% has a good leaching resistance.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2013年第11期1487-1492,共6页
Journal of The Chinese Ceramic Society
基金
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)
关键词
磨细高炉矿渣粉
溶蚀
孔隙结构
微观形貌
氢氧化钙含量
ground granulated blast furnace slag
leaching
pore structure
microtopography
calcium hydroxide content
