中文摘要：

针对膨胀土工程特性，进行了不同掺灰率情况下改良土的击实试验，绘制出相同压实功条件下的击实曲线，探寻到该区域改良土在达到最优干密度时所对应的最佳掺灰率；通过数值拟合分析，掺灰率与最大干密度具有良好的负线性关系，掺灰率与最优含水率之间具有较好的指数关系。

英文摘要：

For the engineering properties of expansive clays, it makes improved soil compaction test un- der different mixing lime rate, draw the compaction curve under the same compaction power condi- tions, finds the optimal dry density corresponding to the best doped gray rate in this area; By numeri- cal fitting analysis, mixed lime rate and the maximum dry density has a goodnegative linear relation- ship, a good exponential relationship between the doped ash rate and optimum water concent.