摘要
为解决超细粉掺合料在混凝土应用中出现的黏度大、流速时间长、易抓底、收缩大的问题,通过合成原料的选择以及调整合成工艺,合成了超细掺合料专用聚羧酸减水剂ZS-CX。结果表明,采用EPEG单体、合成起始温度15℃、滴加反应时间60 min,MAP用量为单体质量的0.6%时,制备的减水剂性能最佳。与市售减水剂相比,净浆流动度、混凝土坍落度和扩展度增大,倒筒排空时间更短,达到5 s,Zeta电位绝对值大,而且混凝土60 d电通量小于1000 C、收缩率降低30%以上。
In order to solve the problems of large viscosity,long flow time,easy bottom gripping and large shrinkage of ultrafine powder admixture in concrete application,the polycarboxylate acid superplasticizer dedicated for ultrafine powder admixture ZS-CX was synthesized by selection of the synthetic material and adjusting the synthesis process.The results show that when the monomer is EPEG,the initial temperature is 15℃,the time is 60 min,and the MAP dosage is 0.6%of the monomer mass,the prepared polycarboxylic acid superplasticizer has the best performance.Compared with the commercial water-reducing agent,the flow of clean paste,slump and expansion of concrete are increased,and the empty time of concrete can reach 5 s.The absolute value of Zeta poterntial is large,the electric flux of 60 d concrete is less than 1000 C,and the shrinkage rate is reduced by more than 30%.
作者
谢瑞兴
于奂泽
岳光亮
唐樱燕
彭立刚
于彭
Johann Plank
XIE Ruixing;YU Huanze;YUE Guangliang;TANG Yingyan;PENG Ligang;YU Peng;Johann Plank(Shandong Zhongsen New Material Co.Ltd.,Ji'nan 250000,China;Beijing Royal School,Beijing 102209,China;Shandong Zhongsen Technology Co.Ltd.,Ji'nan 250000,China;Technische Universitat München,München 80539,Germany)
出处
《新型建筑材料》
2024年第1期49-53,64,共6页
New Building Materials
基金
“十三五”国家重点研发计划项目(2019YFC1907100)。
关键词
超细粉掺合料
聚羧酸减水剂
合成
混凝土
性能
ultrafine powder admixture
polycarboxylic acid superplasticizer
synthesis
concrete
performance
作者简介
谢瑞兴,男,1987年生,硕士,高级工程师,E-mail:xieruixing1987@163.com。;通讯作者:岳光亮,硕士,高级工程师,E-mail:15866634689@163.com。
