The results show that, after being improved by lime, the high liquid limit soil can be used as subgrade filling of expressway as its liquid limit and plastic index being reduced, the dilatability decreased and the value of CBR increased remarkably.

• 研究结果表明，经石灰改性处理的高液限土，液限与塑性指数均降低，膨胀性显著减弱，CBR大幅提升，可用作高等级公路的路基填料。