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.

研究了阳离子聚合物 (KN) 对含有聚羧酸减水剂 (PCE) 和钠基膨润土的水泥浆体絮凝体尺寸的影响。应用 Herschel–Bulkley 模型和改进的 Krieger–Dougherty 模型从流变学分析中获得絮凝物尺寸和晶粒尺寸的比例\({d}_{f}/{d}_{g}\) 。根据我们之前的研究，使用 Herschel–Bulkley 模型来获得屈服应力。在开始时和一小时后都对水泥浆进行了研究。结果表明\({d}_{f}/{d}_{g}\)的值较高在低剪切速率范围内注意到，然后比例随着剪切速率的增加而降低。对于不含KN的含有PCE和钠基膨润土的水泥浆体，由于PCE的聚乙二醇支链嵌入钠基膨润土的层间空间，形成了较大的絮凝体。然而，随着KN添加量的增加，水泥净浆的絮凝体尺寸明显减小。因此，KN在一定程度上抑制了含四氯乙烯和钠基膨润土的水泥浆体中絮凝体的形成。