Evolution of acoustic emission characteristic of cemented sand subjected to triaxial compression tests
A series of drained triaxial compression tests,incorporated with acoustic emission(AE)measurement system,were conducted on cemented sands with various cement mixing ratios under different confining stresses.The results show that the evolution of AE characteristic information of cement-bonded sand has a good correspondence with the stress-strain curve.The cumulative AE hits linearly decrease with the increase of cement mixing ratio,attributed to the restraining effect of the hydration products on micromechanical behaviors dominated by the frictional sliding of sand particles.While the cumulative AE events increase with the increase of confining stress,primarily due to the higher confining stress promoting the propagation of the AE signal in the medium and the fracture of the cementation.The failure pattern of cemented sand gradually shifts from bulging failure to shear band failure with the increased cement mixing ratio and decreased confining stress.
万方数据
维普
