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季铵盐型黏土抑制剂的合成与性能研究
作者：赵春丽，唐新德，杨月青
（山东交通学院 交通土建工程学院，山东 济南 250357）
摘要：通过亲核取代反应，以β-环糊精（β-CD）和3-氯-2-羟丙基三甲基氯化铵（CHPTAC）为主要原料制备了一种季铵盐型黏土抑制剂。红外光谱（FTIR）和核磁共振氢谱（1H NMR）分析结果表明，β-CD和CHPTAC反应得到了目标产物。水泥净浆流动度测试结果表明：当聚羧酸减水剂（PC）与黏土抑制剂折固掺量分别为0.15%和0.015%时，水泥净浆30 min流动度为257 mm，较仅掺加PC时增大5%；当水泥中内掺1%膨润土时，水泥净浆30 min流动度为181 mm，较仅掺加PC时增大13%，自制黏土抑制剂有效降低了聚羧酸减水剂对黏土的敏感性。
关键词：季铵盐型；黏土抑制剂；水泥净浆流动度
中图分类号：TU528.042 文献标识码：A 文章编号：1001-702X（2019）08-0009-04
Synthesis and performance of the quaternary ammonium clay inhibitor
ZHAO Chunli，TANG Xinde，YANG Yueqing
（School of Traffic and Civil Engineering，Shandong Jiaotong University，Jinan 250357，China）
Abstract：The quaternary ammonium clay inhibitor was prepared by nucleophilic substitution reaction of β-cyclodextrin（β-CD） and 3-chloro-2-hydroxypropyl trimethylammonium chloride（CHPTAC），FTIR and 1H NMR results indicated that CHPTAC was
grated on the structure of β-CD successfully. The cement paste fluidity test results show that when the mass dosage of polycarboxylate superplasticizer（PC） and clay inhibitor were 0.15% and 0.015% of cement mass respectively，the fluidity was 257 mm
at 30 min，which is 5% higher than that with only polycarboxylate superplasticizer. When 1% bentonite to replace，the fluidity was 181 mm at 30 min，which is 13% higher than that with only polycarboxylate superplasticizer. The as-prepared quaternary ammonium clay inhibitor could effectively reduces the sensitivity of the polycarboxylate superplasticizer to clay.
Key words：quaternary ammonium，clay inhibitor，cement paste fluidity