试验测定了两种不同粘土对掺加聚羧酸系减水剂砂浆的流动度的影响,发现这两种粘土对砂浆流动性影响相差很大。采用TOC方法测得聚羧酸系减水剂在水泥和粘土吸附量和吸附量随时间的变化规律,发现粘土对聚羧酸系减水剂具有强烈的吸附作用。在此基础上尝试选用一种添加剂与聚羧酸系减水剂复合使用来减少粘土对聚羧酸系减水剂应用的不良作用。 The effects of two different clays on the fluidity of mortar mixed with polycarboxylate-based water reducer were investigated and found that the effects of the two clays on mortar fluidity differed significantly. TOC method was used to measure the adsorption capacity and adsorption capacity of polycarboxylate superplasticizer over time in cement and clay. It was found that clay had a strong adsorption effect on polycarboxylate superplasticizer. On this basis, try to use a combination of additives and polycarboxylate superplasticizer to reduce the adverse effects of clay on the application of polycarboxylate superplasticizer.