不同拌合环境温度下聚羧酸减水剂固含量变化对混凝土性能的影响  

Effects of Solid Content of Polycarboxylate Superplasticizer on the Properties of Concrete under Different Mixing Temperature

作　　者：谢立国[1] 杨永民[1] 陈理达[1] 李兆恒[1] 汤跃[2] 

机构地区：[1]广东省水利水电科学研究院,广东省水利重点科研基地,广东广州510635 [2]成都建筑材料工业设计研究院有限公司,四川成都610051

出　　处：《广东水利水电》2016年第10期32-35,共4页Guangdong Water Resources and Hydropower

摘　　要：减水剂作为混凝土的第六组份加入到混凝土中,可以有效的调节混凝土的工作性能,为制备高性能混凝土提供了技术条件。由于减水剂通过化学作用影响混凝土的性能,拌合环境温度对其加入到混凝土中的性能影响较大。该文研究了聚羧酸减水剂固含量变化以及不同拌合环境温度对混凝土拌合物工作性能以及混凝土硬化后的力学性能的影响。研究结果表明,聚羧酸减水剂作用对固含量和拌合环境温度敏感,改变二者对混凝土工作性能包括减水率,泌水率比、含气量与1 h的坍落度保留值有明显的影响,对混凝土的早期和后期抗压强度也有影响,早龄期的抗压强度比影响更为显著。Water reducer agent is added to the concrete as the sixth components, which could effectively adjust the workability ofconcrete and provide technical support to prepare high performance concrete. In this study, the effects of solid content ofpolycarboxylate superplasticizer on the properties of concrete under different mixing temperature are studied. The results indicate thatthe effects of water reducing agent is sensitive to the solid content and the mixing temperature, which affect the water reducing rate,exudation rate and air content, slump retention value, and the compressive strength of concrete, especially the early agescompressive strength.

关 键 词：聚羧酸减水剂 环境温度 固含量 混凝土泌水 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]