葡萄糖酸钠与聚羧酸减水剂在水泥基材料中的协同作用研究  

Study on the synergistic effect of sodium gluconate and polycarboxylate superplasticizer in cement-based materials

作　　者：畅佳超 王育宏 胡海力 黄家叙 谭锋章 CHANG Jiachao;WANG Yuhong;HU Haili;HUANG Jiaxu;TAN Fengzhang(Nanning Xintairuike Building Materials Co.,Ltd.,Nanning 530000,China;Mingyao International Group Co.,Ltd.,Nanning 530000,China)

机构地区：[1]南宁新泰瑞科建材股份有限公司,广西南宁530000 [2]明耀国际集团有限公司,广西南宁530000

出　　处：《混凝土与水泥制品》2024年第9期28-31,37,共5页China Concrete and Cement Products

基　　金：南宁市科学研究与技术开发计划项目(20191016)。

摘　　要：研究了葡萄糖酸钠(SG)与聚羧酸减水剂母液(PC-A、PC-B)复掺对水泥基材料性能的影响,并分析了其协同作用。结果表明:当SG、PC-A单掺时,在相同掺量下,SG对水泥净浆流动度及胶砂减水率的提高有一定的效果,但其减水性和保坍性远低于PC-A;SG、PC-A、PC-B三者复掺时,在水泥颗粒上存在竞争吸附,SG可使聚羧酸减水剂更好地发挥其减水性和保坍性,具有较好的协同作用;从工作性来看,RK-A-7组的SG与聚羧酸减水剂母液复掺比例为最佳;从凝结时间来看,RK-A-4组最佳;从抗压强度来看,RK-A-6组最佳。The effect of sodium gluconate(SG)and polycarboxylate superplasticizer mother liquor(PC-A,PC-B)on the properties of cement-based materials was studied,and their synergistic effect was analyzed.The results show that when SG and PC-A are added separately,at the same content,SG has a certain effect on improving the fluidity of cement paste and the water reduction rate of mortar,but its water reduction and slump retention are much lower than PC-A.When SG,PC-A,and PC-B are mixed together,there is competitive adsorption on cement particles.SG can better enhance the water reducing and slump retaining properties of polycarboxylate superplasticizer,and has a good synergistic effect.From the perspective of workability,the optimal ratio of SG and polycarboxylate superplasticizer mother liquor is achieved in the RK-A-7 group.From the perspective of setting time,the RK-A-4 group is the best.From the perspective of compressive strength,the RK-A-6 group is the best.

关 键 词：聚羧酸减水剂 葡萄糖酸钠 流动度 减水率 竞争吸附 协同作用 

分 类 号：TU528.042[建筑科学—建筑技术科学]