Study on Mechanical Properties of the Compound Soil of Feldspathic Sandstone and Sand Based on Micro – level

It is of great practical significance to study the mechanical properties composite materials arsenic and sandstone control ecological environment in soft area. In order understand material structural characteristics under different compound proportions, microstructure composition elements were analyzed by microscopic test mercury injection from level. The dynamic three axis instrument was used carry out mixing ratio. results showed that main mineral components feldspathic are quartz, albite, montmorillonite calcite. structure has strength anhydrous state. When water saturated, collapses, cohesive force decreases rapidly, it collapsibility; Due complexity optimization gradation, permeability greatly reduced; macroscopic mechanics exhibits strain hardening nonlinear characteristics.