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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。
In this paper, STW polymer soil stabilizer to improve water stability of cohesive soil aggregates were studied. The results showed that STW stabilizers could greatly improve the water stability of clay aggregates at low concentration (3% ~ 9%). Under the same particle size, the water stability index K of aggregates increased with the increase of stabilizer concentration Increases with the increase of particle size. With the same concentration of stabilizer, the water-stable K of aggregates decreases with the increase of particle size. According to the disintegration characteristics of the aggregates before and after the modification, the disintegration models of two kinds of agglomerates of progressive and burst were proposed. The mechanism of the STW polymer soil stabilizer to improve the aggregates of the cohesive soil was also analyzed.