早期高温强碱环境下转炉钢渣的长龄期水化特性
廖延武，胡 瑾*早期高温强碱环境下转炉钢渣的长龄期水化特性
廖延武，胡 瑾*
（1. 四川绵筑新材料有限公司，中心实验室，四川德阳618200；2. 四川建筑职业技术学院，材料工程系，四川成都610399）
摘 要 使用具有微弱自身水硬性的转炉钢渣制备了“无熟料”胶凝材料，改变早期水化环境，并通过压汞法和扫描电子显微镜测试了长龄期（10年）后钢渣体系硬化浆体的孔结构和微观形貌，研究了早期高温强碱环境对于钢渣长龄期水化的影响。结果显示：早期高温强碱环境对钢渣体系的后期孔结构产生不利影响；早期高温强碱环境并不影响凝胶产物的种类，都是C-A-S-H凝胶，且Ca(OH)2主要以不规则的板状紧密叠加的形式存在；早期高温强碱环境对钢渣中凝胶产物的平均Ca/Si和平均Al/Si影响较小。
关键词 高温强碱；转炉钢渣；长龄期
中图分类号：TU58+2 文献标识码：A doi:10.3969/j.issn.1000-6281.2021.02.004
Long-age hydration characteristics of converter steel slagactivated by early high-temperature and an alkaline activator
LIAO Yan-wu 1, HU Jin1, 2*
(1. Research and Department Laboratory, Sichuan Mianzhu New Materials Co., Ltd., Deyang Sichuan 618200; 2. Department of Materials Engineering, Sichuan College of Architectural Technology, Chengdu Sichuan 610399，China)
Abstract "No clinker" cementitious materials were prepared by converter steel slag with weak self-hydraulic property. Pore structure and microstructure of hardened steel slag pastes after long age (10 years) under different hydration conditions were measured by using a mercury intrusion porosimeter and scanning electron microscopy. The influence of early high-temperature curing and an alkaline activator on long-age hydration characteristics of steel slag system was explored. The results show that increasing curing temperature and adding an alkaline activator simultaneously has a negative effect on the long-age pore structure of steel slag system. Changing hydration environment does not affect the types of gel products, which are all C-A-S-H gel. The Ca(OH)2 mainly exists in the form of irregular plate and compact superposition. The average Ca/Si and average Al/Si ratios are little affected by increasing curing temperature and adding an alkaline activator simultaneously.
Keywords high-temperature and an alkaline activator；converter steel slag；long age
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