摘要
以甲基丙烯酸(MAA)、甲氧基聚乙二醇甲基丙烯酸酯(MAAMPEA)和甲基丙烯酸磺酸钠(SMAS)为主要单体,以过硫酸铵(APS)为引发剂合成聚羧酸减水剂,对其原料配合比、合成工艺参数与水泥净浆流动度、混凝土性能之间的关系进行试验。研究结果表明:当HMMME1300与MAA的摩尔比值为4、MAA:SAMS的摩尔比值为10、APS用量为反应物总量的2.5%的原料配合比下,在反应温度为85～90℃、单体滴加时间为3 h时,合成的聚羧酸减水剂对水泥有良好的分散性能和分散保持性能,对混凝土性能有显著的提高;单体滴加完毕后的稳定工艺,对提高减水剂储存稳定性有很大的帮助。
A kind ofpolycarboxylate superplasticizer has been synthesized with MAA,MAAMPEA, SMAS, APS.Research on the relationship be- tween the raw material ratio, technical parameter with the fluidity of cement paste and the performance of the concrete.The result indicated that when n（HMMME1300）：n（MAA）=4：l ,n（MAA）：n（SAMS）=10：n（APS） is 2.5% of monomer weight,when the reaction temperature was 85-90 C ,the dropping of the monomer was 3 hours,the polyearboxylate superplastieizer had good dispersion to the cement and could keep the character.It can en- hance the performance of the concrete;the stable process of dropping the monomer is helpful to the stable storage of the superplasticizer.
出处
《混凝土》
CAS
CSCD
北大核心
2012年第9期94-97,共4页
Concrete
关键词
聚羧酸
混凝土减水剂
水泥净浆流动度
储存稳定性
polycarboxylate
concrete superplasticizer
the fludility of the cement paste
stable storage
