LAUSR

Abstract Coarse aggregates of shape-modified corundum (0.5–1 mm) were obtained by treating corundum particles in an intensive mixer, and the effect of shape-modified coarse aggregates on the pore structure and properties of the porous materials were investigated. After the shape modification process, the morphologies of the coarse aggregates became more regular, with increased circularities and decreased aspect ratios. This was not only conductive to accelerating the rearrangement of coarse aggregate particles during the press-forming process and obtaining a more tightly packed structure but also contribute to maintaining the structures of the pores from the stacking of coarse aggregate particles in the porous material. By using shape-modified coarse aggregates, the cold compressive strengths and bulk densities of the specimens were increased, while the apparent porosity was decreased. More interestingly, the Darcian and non-Darcian permeability coefficients of the specimens were enhanced despite the decreased apparent porosities.