文献类型：期刊文献

英文题名：Influence of cationic polymer on the floccule size of cement pastes containing polycarboxylate superplasticizer and Na-bentonite

作者：Wen, Pengpeng[1];Feng, Zhongjun[2,3];Zheng, Baicun[1]

机构：[1]East China Univ Sci & Technol, Res & Dev Ctr Sports Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Sunrise Polymer Mat Co Ltd, Shanghai 200231, Peoples R China;[3]Shanghai Engn Res Ctr Construct Admixture, Shanghai 200231, Peoples R China

年份：2023

卷号：35

期号：2

起止页码：105

外文期刊名：KOREA-AUSTRALIA RHEOLOGY JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000979104100001)】；

基金：AcknowledgementsThe authors would like to gratefully acknowledge the financial support (19DZ2293200) from Shanghai Professional Technical Service Platform of Sports Materials. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

语种：英文

外文关键词：Floccule size; Cement paste; Bentonite; Polycarboxylate superplasticizer; Cationic polymer

摘要：Influence of cationic polymer (KN) on the floccule size of cement pastes containing plycarboxylate superplasticizer (PCE) and Na-bentonite was studied. The proportion of floccule size and grain size d(f)/d(g) was obtained from a rheological analysis with the application of Herschel-Bulkley model and modified Krieger-Dougherty model. Herschel-Bulkley model was used to gain the yield stress according to our previous study. Cement pastes were investigated both at the beginning and after one hour. The results showed that a high value of d(f)/d(g) was noticed under low shear rate range and then the proportion decreased with the increase of shear rate. For cement paste containing PCE and Na-bentonite in the absence of KN, larger floccule was formed due to the intercalation of polyethylene glycol branch chain of PCE into the interlayer space of Na-bentonite. However, the floccule size of cement pastes obviously decreased with the increasing addition amount of KN. Thus, KN will restrain the formation of floccules in cement pastes containing PCE and Na-bentonite to a certain extent.