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聚羧酸系减水剂对脱水相制备UHPC性能的影响
作者：韦鹏亮1，余睿2，蔡昱1，陈露一1，董恩来2
（1.中铁桥研科技有限公司，湖北 武汉 430040；
2.武汉理工大学 硅酸盐建筑材料国家重点实验室，湖北 武汉 430070）
摘要：脱水相具有很强的吸附作用，聚羧酸系减水剂与脱水相的相容性直接影响超高性能混凝土（UHPC）的性能。试验采用3种不同种类的聚羧酸减水剂，研究减水剂对脱水相制备的UHPC工作性能、流变性能、力学性能的影响及其相容性。结果表明：SPT型和A97BS型聚羧酸减水剂可增大掺加脱水相制备超高性能混凝土浆体的塑性黏度，可以优化脱水相制备UHPC的工作性能；3种减水剂对UHPC抗压强度的影响大小为：PC-100型>SPT型>A97BS型；Zeta电位绝对值大小为：A97BS型>SPT型>PC-100型；总体而言，SPT型和A97BS型减水剂与脱水相的相容性较好。
关键词：UHPC；脱水相；聚羧酸减水剂；相容性
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2022）11-0026-04
Effect of polycarboxylate superplasticizer on the performance of dehydrated phase for UHPC
WEI Pengliang1，YU Rui2，CAI Yu1，CHEN Luyi1，DONG Enlai2
（1.China Railway Qiaoyan Technology Co. Ltd.，Wuhan 430040，China；
2.State Key Laboratory of Silicate Building Materials，Wuhan University of Technology，Wuhan 430070，China）
Abstract：Dehydration phase has strong adsorption. The compatibility of polycarboxylate superplasticizer with dehydrated phase directly affects the performance of UHPC（UHPC，short for the Ultra-High Performance Concrete）. In this study，three kinds of superplasticizer were used to explore the influence of superplasticizer on workability，rheological properties，mechanical properties of UHPC prepared by dehydrated phase as well as their compatibility. The results show that SPT and A97BS superplasticizer can increase the plastic viscosity of ultra-high performance concrete paste prepared by adding dehydrated phase，and can optimize its working performance. The influence on compressive strength：PC-100>SPT>A97BS. The absolute value of zeta potential：A97BS> SPT>PC-100；In general，SPT and A97BS superplasticizer have better compatibility with dehydration phase.
Key words：UHPC，dehydration phase，polycarboxylate superplasticizer，compatibility