Abstract:

The recent development in modification methods and performance studies of lignosulfonate，a type of water-reducers，is reviewed. Physical modification methods include separation，purification and molecular weight classification of lignosulfonate. Chemical modification methods include oxidation，sulfonation，phenolation，hydroxymethylation，Mannich reaction and graft copolymerization. The main aspects of performance studies of lignosulfonate are its influences on setting time，strength，hydration process of cement and adsorption behavior on cement particles. Further studies and optimization of modification methods to lower cost on the basis of performance enhancement，along with basic studies of application of modified products through modern analysis methods are research directions for this green water-reducer.

摘要：

简述了木质素磺酸盐减水剂的改性方法和性能研究的最新进展。物理改性方法包括木质素磺酸盐的分离提纯和对其分子量进行分级；化学改性方法主要有氧化、磺化、酚化、羟甲基化、曼尼希反应和接枝共聚等；木质素磺酸盐减水剂对水泥凝结时间、强度、水化过程的影响以及在水泥颗粒表面吸附行为是其性能研究的主要方面。最后总结认为，进一步加强改性方法研究、优化改性工艺、在提高性能的基础上降低成本、结合现代分析测试手段进行改性产品应用性能基础研究是木质素磺酸盐这一绿色减水剂得到有效推广应用的研究方向。