Effect of Municipal Solid Waste Incineration Bottom Ash Powder on Properties of Asphalt Mixture

Abstract:

Municipal solid waste incineration (MSWI) bottom ash powder (BAP) was used to replace (100% by mass) natural limestone powder in asphalt mixture, and its feasibility and effect on properties were discussed. Based on the designing of asphalt mixture proportion, the effect of BAP on design asphalt content and Marshall index was also studied. Pavement performance of asphalt mixture with BAP was investigated by room testing. The results show that the design asphalt content and the Marshall stability will increase because of the use of BAP. The high temperature stability of asphalt mixture with BAP increases benefitting from its rough and porous surface. The increasing of asphalt content and extruding structure can improve the low temperature crack resistance of asphalt mixture with BAP. Rather, the water stability decreases a little because BAP contains some SiO2 and metal oxides, but the infiltration and adhesion between asphalt and BAP is better.