化学外加剂在低水泥浇注料中的作用机理与应用分析  

Mechanism and Application of Chemical Admixtures in Low Cement Castable

作　　者：李柱凯[1,2] 黄晓燕[2] 何廷树[1] 

机构地区：[1]西安建筑科技大学材料科学与工程学院,西安710055 [2]四川建筑职业技术学院材料工程系,德阳618000

出　　处：《材料导报（纳米与新材料专辑）》2012年第1期361-365,共5页

摘　　要：分析了在低水泥浇注料中,由于微粉粒子在水中产生电离、吸附和晶格取代等现象导致其表面荷电形成双电层结构、微粉粒子产生絮凝的现象;阐述了化学外加剂对微粉粒子的分散作用机理,即DLVO理论和HVO理论;分别介绍了萘系(FDN)、脂肪族、氨基磺酸盐系、聚羧酸系高效减水剂的具体作用机理;分析了在低水泥浇注料中三聚磷酸钠、六偏磷酸钠、柠檬酸钠、密胺树脂、聚丙烯酸钠、氨基磺酸盐、聚羧酸系高效减水剂等化学外加剂的应用现状。认为聚羧酸系高效减水剂具有较好的减水效果,其生产与应用研究将越来越广泛和深入。The reason of flocculation for the powder particles in the low cement castable was analyzed, because powder particles surface charged, and formed the electric double layer structure hy ionization, adsorption and replace the lattice in the water. It was described two mechanisms of dispersion to the powder particles that DLVO theory and HVO theory for chemical admixtures, the specific mechanism of FDN, aliphatic, amino sulfonate, polycarhoxylate su perplasticizer was introduced, analyzed the application status for sodium tripolyphosphate, sodium hexametaphos phate, sodium citrate, melamine resin, sodium polyacrylate, amino sulfonate, polycarboxylale superplasticizers, etc was analyzed. The produelion and applied research of the polycarboxylate superplasticizer with good water-redueing effects will be more extensive and in-depth. Key words chemical admixtures, DLVO theory, HVO theory, polycarboxylate superplasticizer

关 键 词：化学外加剂 DLVO理论 HVO理论 聚羧酸系高效减水剂 

分 类 号：TQ175.732[化学工程—硅酸盐工业]