摘要
合成出一类含多种侧链官能团的共聚羧酸高效减水剂 (CoPoCa Ⅲ ) .这类共聚物分子中带有羧酸及其盐 ,磺酸及其盐 ,羟基 ,酯基及醚基等 .减水率3R 2 8～3 0 % ,新拌混凝土初始坍落度很大 ,且 1h内坍落度保持性3R 90 % ,混凝土 2 8d抗压强度最大增加 56% .CoPoCa Ⅲ类高效减水剂还可以与萘系减水剂复配使用 ,采用 2 0 %的CoPoCa Ⅲ与 80 %萘系复配的复合型高效减水剂 。
A series of Co-Poly Carboxylic Acid superplasticizer(CoPoCa-Ⅲ), which contains various side functional groups such as carboxylic acid group,sufonic acida nd its salt, hydroxy group, carboxylic ester and ether group. are synthesized.C oPoCa-Ⅲ type superplasticizer shows high water-reducing ratio, high initia l s lump of concrete and lower slump loss. The compressive strength in 28 days i ncre ases by max. 56%. CoPoCa-Ⅲ can also be used in compound superplasticizerby co mbination with NSF, and the compound superplasticizer reveals both high wa ter re ducing ratio and good slump retention ability.
出处
《应用基础与工程科学学报》
EI
CSCD
2002年第3期234-238,共5页
Journal of Basic Science and Engineering
