软水溶蚀环境中水泥–矿渣复合胶凝材料的浆体结构变化.pdf

马昆林等:水泥–粉煤灰–石灰石粉浆体塑性黏度的影响因素· 1487 ·第41卷第11期DOI:.0454– 软水溶蚀环境中水泥–矿渣复合胶凝材料的浆体结构变化刘仍光1,2,张波1,阎培渝1(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) 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)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)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。关键词:磨细高炉矿渣粉;溶蚀;孔隙结构;微观形貌;氢氧化钙含量中图分类号: 文献标志码:A 文章编号:0454–5648(2013)11–1487–06 网络出版时间:2013–10–28 15:40:49 网络出版地址:s/detail/ Microstructural Variation of Hardened Cement-slag Pastes Leached by Soft Water LIU Rengguang1,2,ZHANG Bo1,YAN Peiyu1(1. Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 2. Institute of Civil Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, China) Abstract: The pore structure, hydration products, microtopography and Ca(OH)2 content of hardened cement-plex binder pastes leached by soft water were investigated by means of mercury intrusion porosimetry, X-ray diffraction, scanning electron mi-croscopy and thermogravimetry, respectively. The effect of soft water leaching on the microstructure of binder paste was discussed.