Study on Permeability Performance and Prediction Model of Coal Gangue Pervious Concrete

To expand the in-situ utilization of coal gangue in mining area and meet the demand of “sponge city”, the permeability coefficient, total porosity and effective porosity of coal gangue pervious concrete (CGPC) in different mixtures were deeply explored. The results show that the permeability coefficient of CGPC can reach 1.5 ~ 2 mm/s. In general, the permeability coefficient and porosity of CGPC increase as the aggregate particle size and designed porosity increase. Effective porosity is the key factor affecting the permeability coefficient of CGPC. More importantly, the prediction model of permeability coefficient of CGPC is established based on the mix proportion, providing a theoretical reference for the application of CGPC in pervious pavement of mining areas.