低碳胶凝材料的研究进展

Research Progress of Low-carbon Binders

水泥作为构筑现代社会不可或缺的原材料,在满足基础设施建设巨大需求的同时,自身生产伴随着CO_(2)排放高的问题。近年来,为减少水泥生产过程中的CO_(2)排放,实现水泥行业可持续发展,人们提出了一系列CO_(2)减排措施,包括提高能源效率、使用替代原燃料、使用辅助胶凝材料、采用CCUS技术以及开发新型低碳胶凝材料等。从长远来看,低碳胶凝材料将在水泥行业CO_(2)减排中起重要作用。本文总结了低熟料水泥、低钙水泥、固碳水泥和碱激发胶凝材料四类低碳胶凝材料的研究进展,介绍了各类低碳胶凝材料的制备方法与基本性能,对比分析了传统硅酸盐水泥与低碳胶凝材料的CO_(2)排放,最后指出了低碳胶凝材料发展过程中存在的问题,并为其进一步研究工作提出了建议。

Cement is an essential building material for society’s infrastructure around the world.However,the cement industry is responsible for an unacceptable increase in CO_(2) emissions.To mitigate these emissions,several approaches have been proposed,including improving energy efficiency,using alternative raw materials and/or alternative fuels,utilizing CCUS technology and developing low-carbon binders.In the long term,low-carbon binders are expected to play an important role in CO_(2) emission reduction of the cement industry.In this review,we summarize the research progress on four types of low carbon binders,viz.low clinker cements,low calcium cements,carbon fixation cements and alkali activated binders,introduce the preparation methods and properties of low-carbon binders,compare and analyze CO_(2) emissions of traditional Portland cement and low-carbon binders.Finally,we point out the issues on the development of low-carbon binders,and put forward proposals on their further research.