摘   要：通过总有机碳吸附试验，初步探究影响砂浆流动性的原因，再结合荧光、XRD和SEM，对具代表性的骆马湖砂黏土矿物成分进行分析，并研究其改善措施及开发抗泥剂。结果表明，聚羧酸减水剂主要被骆马湖砂黏土矿物中蒙脱土大量吸附，这类型砂会严重降低聚羧酸减水剂的塑化性能；提高水胶比和减水剂掺量均能明显增加砂浆的流动性；开发出的两款抗泥剂KNJ-1和KNJ-2均能增大砂浆流动性，降低砂浆的流动度经时损失，可全过程发挥作用；同时，KNJ-1+KNJ-2具有良好的协同效果，“隔离与阻止”共同作用下好于单独使用的效果。

Abstract: Research on cause of mortar flowability by total organic carbon adsorption test preliminary, and the constituents of clay minerals of Luoma sand by XFR, XRD and SEM are studied, while the improvement measures and anti-clay agents are researched. The results show that montmorillonite are contained in Luoma sands, adsorption a large number of polycarboxylate superplasticizer is the main cause of reduced mortar fluidity. Improving water-cement ratio and increasing the dosage of polycarboxylate superplasticizer can increase the fluidity of mortar, but both methods have certain limitations. Anti-clay agents of KNJ-1 and KNJ-2 can effectively increase the mortar fluidity and reduce the mortar fluidity with time loss in the process. KNJ-1 and KNJ-2 have a good synergistic effect, better than the KNJ-1 and KNJ-2 used alone by “prevention and isolation”.