Triaxial tests were performed on artificially cemented gravel–silty clay mixed soils and remoulded samples under consolidated drained conditions. The aim was to investigate the effects of the content of silty clay and confining pressure on the stress–strain, volumetric strain and other mechanical characteristics of the cemented and remoulded samples. The test samples were prepared with different fines contents and effective confining pressures. The results showed that both the confining pressure and the fines content had a great effect on the mechanical properties of the cemented and remoulded samples. During triaxial shearing, the cemented samples underwent dilation and strain-softening, accompanied by the appearance of shear bands at a confining pressure lower than 100 kPa and fines content less than 30%. Otherwise, the cemented samples showed strain-hardening and contraction, accompanied by bulging failure. All the remoulded samples showed strain-hardening and contraction, accompanied by bulging failure during triaxial shearing. The shear strength decreased with increasing fines content and the influence of the fines content increased with an increase in confining pressure. It was also found that, the higher the fines content, the lower the cohesion and friction angle of the cemented and remoulded samples.

中文翻译：

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人工胶结砾石粉质粘土混合土的力学特性

在固结排水条件下，对人工胶结的砾石-粉质粘土混合土和重塑样品进行了三轴试验。目的是研究粉质粘土含量和围压对胶结和重塑样品的应力-应变，体积应变和其他机械特性的影响。制备具有不同细粉含量和有效围压的测试样品。结果表明，围压和细粉含量对胶合和重塑样品的力学性能有很大影响。在三轴剪切过程中，胶结样品进行了膨胀和应变软化，并在低于100 kPa的围压和小于30％的细粉含量的情况下出现了剪切带。除此以外，胶结样品表现出应变硬化和收缩，并伴有鼓胀破坏。所有重塑的样品均显示出应变硬化和收缩，并伴随三轴剪切过程中的鼓胀破坏。剪切强度随着细粉含量的增加而降低，并且细粉含量的影响随着围压的增加而增加。还发现，细粉含量越高，胶合和重塑样品的内聚力和摩擦角越低。