醛酮-木质素共聚高效减水剂的性能研究  

Investigation on properties of a sulfonated acetone formaldehyde-lignosulfonate multipolymer superplasticizer

作　　者：孙振平[1] 冯波[1] 黄雄荣[1] 陈柯柯[1] 蒋正武[1] 张冠伦[1] 陈国忠 陈炜 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海200092 [2]江苏特密斯混凝土外加剂有限公司,江苏镇江212142

出　　处：《新型建筑材料》2009年第12期1-5,共5页New Building Materials

基　　金：国家科技支撑计划项目资助(2006BAJ05B01-03);上海市科委重点项目资助(072112006-4);上海市青年科技启明星计划(04qmx1428)

摘　　要：针对醛酮系减水剂原材料价格上涨与纸浆黑液的资源化利用,设计合成了醛酮-木质素共聚高效减水剂(SAF-LS)。采用红外光谱和黏度试验对醛酮-木质素之间的接枝共聚反应进行了论证;对比了SAF、SAF-LS以及醛酮减水剂与木质素冷复配产品(SAF+LS)在净浆、混凝土中的作用效果。结果表明,SAF-LS性能略差于SAF,但远优于SAF+LS。利用SAF-LS和缓凝组分RT-2配制了强度等级为C30～C50的预拌混凝土,坍落度保持性和强度发展均十分优良。Aiming at the price rising of the raw materials for sulfonated acetone formaldehyde polymer superplasticizer （SAF） and recycling utilization of paper pulp liquor, a kind of sulfonated acetone formaldehyde-lignosulfonate muhipolymer superplasticizer （SAF-LS） is developed. The graft copolymerization between sulfonated acetone formaldehyde and lignosulfate is proved by means of infrared spectroscopy and viscosity test. The effects of SAF, SAF-KS and mixing product of SAF and paper pulp liquor（SAF＋LS） on cement paste and concrete are compared experimentally. The results indicate that the properties of SAF-LS are nearly the same to SAF and much better than SAF＋LS. For the ready-mixed concrete of C30 to C50 designed and produced with SAF-LS and a retarder RT-2,its slump retention and strength development trend are excellent.

关 键 词：醛酮系减水剂 纸浆黑液 木质素磺酸盐 醛酮-木质素共聚减水剂 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]