Concrete dense packing model and engineering properties of aggregate concretes with different densities

Based on the concrete design logic of the densified mixture design algorithm (DMDA),this paper investigated aggregates with different densities,i.e.,aggregates sintered by using a reservoir's waste sludge,natural aggregates (stones),and aggregates of solid steel balls,whose aggregate densities are 1.7,2.6,and 7.8 kg·m^-3,respectively.Through the DMDA accumulation,lightweight,normal weight,and heavyweight high-performance concrete materials as well as their mixing ratios were obtained.The characteristics of these aggregate concretes,including the mixture properties and the effect of hardening behavior,were compared and analyzed.