The improvement of sand and clay using lime or cement to control solidification is common practice. Among the many constitutive models for solidification proposed for clay and sand, few can reproduce the combined behavior of cement-treated clay and cement-treated sand. Here, four typical experimental results for cement-treated soil have been chosen from the literature to consider the shear and consolidation behavior for clay and sand, especially for a low cement mixing ratio. The elasto-plastic constitutive model was used to simulate this behavior considering the soil skeleton structure.

The simulation results obtained using the model agreed with the experimental test results both for the cement-treated clay and the cement-treated sand. In the case of the clays, the experimental results were reproduceable using material constants for elasto-plastic and evolution parameters and only required changes in the initial state values, regardless of whether the soil was treated or untreated. In the case of the sands, the structure decay index of the treated sand became smaller than that of the untreated sand. Moreover, the cement-treated loose sand did not exhibit softening behavior. This was attributed to the slow rate of decay of the highly structured cement-treated loose sand due to the solidification of the cement. The degree of structure and the overconsolidation ratio both increased with higher amounts of admixed cement. The model developed in this study was capable of describing the mechanical behavior of both cement-treated clay and cement-treated sand.

使用石灰或水泥改善砂和粘土以控制凝固是常见的做法。在为粘土和砂提出的许多凝固本构模型中，很少有人能够再现水泥处理粘土和水泥处理砂的组合行为。在这里，从文献中选择了四个典型的水泥处理土壤的实验结果来考虑粘土和沙子的剪切和固结行为，特别是对于低水泥混合比。弹塑性本构模型用于模拟考虑土骨架结构的这种行为。

使用该模型获得的模拟结果与水泥处理粘土和水泥处理砂的实验测试结果一致。在粘土的情况下，使用弹塑性和演化参数的材料常数可以重现实验结果，并且只需要改变初始状态值，无论土壤是否经过处理。在砂的情况下，处理砂的结构衰减指数变得小于未处理砂的结构衰减指数。此外，水泥处理过的松散沙子没有表现出软化行为。这是由于水泥固化导致高度结构化的水泥处理过的松散沙子的腐烂速度缓慢。结构度和超固结比都随着掺合水泥量的增加而增加。