聚羧酸高效减水剂对分选和磨细粉煤灰作用差异研究  

Different Effect of Polycarboxylate Superplasticizer on Sorting and Ground Fly Ash

作　　者：伍勇华[1] 周思思[1] 南峰[1] 白琴琴[1] 金瑞灵[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055

出　　处：《硅酸盐通报》2015年第5期1210-1214,共5页Bulletin of the Chinese Ceramic Society

基　　金：陕西省自然科学基金资助项目(2013JQ6015)

摘　　要：为揭示聚羧酸高效减水剂对分选和磨细粉煤灰的作用效果差异,采用净浆流动度法和吸光度法,研究了聚羧酸高效减水剂对两种粉煤灰浆体流动度的影响差异,以及在其表面吸附特征的差异。结果表明,在水灰比为0.4时,磨细粉煤灰浆体没有流动性,而分选粉煤灰净浆流动度为98 mm;但掺入聚羧酸高效减水剂后,磨细粉煤灰浆体的流动性明显高于分选粉煤灰;聚羧酸高效减水剂在两种粉煤灰颗粒表面的吸附均符合Langmuir等温吸附方程,且磨细粉煤灰颗粒表面的吸附量远大于分选粉煤灰。To investigate the different effects of polycarboxylate superplasticizer on the sorted fly ash and the grounded one, paste fluidity test and absorption spectrometry are used to study the different influences of polycarboxylate superplasticizer on the paste fluidity and surface adsorption characteristics of two kinds of fly ash. The results showed that, under the water-cement ratio of 0.4, the grounded fly ash paste had no liquidity, while the paste fluidity of sorted fly ash was 98 ram. Nevertheless, adding polycarboxylate superplasticizer, the liquidity of grounded fly ash paste was significantly higher than the sorted fly ash, and the adsorption behavior of polycarboxylate superplasticizer of two kinds of fly ash particles were both conformed to the Langmuir isothermal adsorption equation. Besides, the adsorption amount on the surface of grounded fly ash particles was much larger than that of the sorted fly ash.

关 键 词：聚羧酸高效减水剂 粉煤灰 流动度 吸附 

分 类 号：TU528[建筑科学—建筑技术科学]