王 兵,范士敏,亓 帅,王 涛,马建峰,韩 正,冉千平
王兵,范士敏,亓帅,等.具有黏土耐受性缓凝剂的制备及在混凝土中的应用[J].混凝土与水泥制品,2019(8):5-7+18.
WANG B,FAN S M,QI S,et al.Synthesis of Phosphate Retarder with Anti-clay Ability and Its Application in Concrete[J].China Concrete and Cement Products,2019(8):5-7+18.
具有黏土耐受性缓凝剂的制备及在混凝土中的应用
王 兵,范士敏,亓 帅,王 涛,马建峰,韩 正,冉千平
王兵,范士敏,亓帅,等.具有黏土耐受性缓凝剂的制备及在混凝土中的应用[J].混凝土与水泥制品,2019(8):5-7+18.
WANG B,FAN S M,QI S,et al.Synthesis of Phosphate Retarder with Anti-clay Ability and Its Application in Concrete[J].China Concrete and Cement Products,2019(8):5-7+18.
摘 要:合成了一种含不同磷酸基个数的有机磷酸盐缓凝剂,并将其结构、缓凝性能及抗黏土性能进行了测试表征。混凝土试验测试结果表明,合成出的磷酸盐缓凝剂能延缓水泥水化,缓凝作用好,与聚羧酸减水剂(PCE)复配后,提高了聚羧酸减水剂(PCE)的保坍性能。同时磷酸基缓凝剂还具有很好的抗黏土性能,吸附性能测试表明,所合成的磷酸盐缓凝剂能减少蒙脱土对减水剂的吸附。
Abstract:A new structure of phosphate retarder with different amount of phosphate groups was systhesized. The chemical structures of these retarders were determined by Fourier transform infrared. The properties of setting time, anti-clay ability and adsorption properties of the phosphate retarders after compound with polycarboxylate acid-based superplastizer(PCE) were studied. The experimental results indicate that the phosphate retarders showe a good performance in terms of workablility retention, retarding ability and anti-clay ability, and the phosphate retarders can reduce the adsorption amount of PCE on montmorillonid.
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