STW型高分子土壤稳定剂改良粘性土团聚体水稳性实验研究

Experimental study on the water-stability property of clay aggregates stabilized by STW polymer soil stabilizer

摘要: 本文对STW型高分子土壤稳定剂改良粘性土团聚体的水稳性进行了试验研究。结果表明,STW型稳定剂在低浓度(3%~9%)就可以大幅度提高粘性土团聚体的水稳性;在相同粒径条件下,团聚体水稳性指数K随着稳定剂浓度的增大而增大;在同一种稳定剂浓度作用下,团聚体水稳性K随着粒径的增大而减小。根据改良前后团聚体的崩解特点,提出了渐进式和炸裂式两种团聚体崩解模式,并对STW型高分子土壤稳定剂改良粘性土团聚体的机理进行了分析。

Abstract: In this paper,the water-stability property of clay aggregates stabilized with different concentration of STW type polymer soil stabilizer,is tested using static-water measure method.The test results indicate that STW type soil stabilizer with low concentration 3%～9% can greatly improve the soil water-stability property;at the same concentration,the stability index K decreases with the increasing the aggregate size.Two collapse models of soil aggregates are proposed,and the modified mechanism of the STW type macromolecule soil stabilizer for improving the water-stability property of soil aggregates is discussed.