ABSTRACT
ABSTRACT: Large direct shear test and compression test for the improved filler from blast furnace slag by the large direct shear apparatus were conducted, and relevant mechanical parameters of the improved filler were obtained. Test results show that water content has little influence on the mechanical index as fine particle cannot fill the interspace of coarse particles, so the filler has good water stability. There is little occlusion cohesion of the mixture filler when the vertical stress is less than 150 kPa and large occlusion cohesion if it is more than 150 kPa. The less the vertical stress, the more the shear shrinkage at the initial stage and the less the shear dilation at a later stage. When the vertical stress is more than 150 kPa, the shear dilation reduces to a greater degree than the shear zone formed by the fragmentation and breakage of coarse particles. Compression at the stage of loading is mainly concerned with the smashed edges and corners and long flat shape particles breaking off. The settlement calculation of the foundation should refer to the deformation modulus at the stage of reloading when the foundation is constructed by dynamic consolidation.
