The test results indicate that: 1) Compared with unmodified soils, the free swelling ratio, plastic index and clay fraction of fly ash-treated soils and Lime-treated soils decrease obviously.

试验结果表明：1）相比于未改性土，粉煤灰改性土和石灰改性土自由膨胀率、塑性指数、胶粒含量都显著降低；