Performance of a Pervious Concrete Pavement Containing Municipal Solid Waste Incineration Bottom Ash: A Lebanese Case Study

This paper studies the potential of using municipal solid waste incineration bottom ash (MSWI-BA) to produce an eco-friendly pervious concrete pavement in Lebanon, reduce landfill demand, and decrease the requirement of natural resources. The performance of a pervious concrete containing different contents of MSWI-BA, obtained from a plant in Lebanon, as a partial replacement of natural aggregate (NA) was investigated. The first stage of the research was to select appropriate mix proportions to produce pervious concrete with relatively high permeability and high strength with coarse natural aggregate particle size ranging from 2.36 to 9.5 mm. A control mix (M1) was chosen without the use of MSWI-BA. In the other mixes, the natural aggregate was replaced with 25%, 50%, 75%, and 100% MSWI-BA (by volume), having similar particle size. The effects of MSWI-BA replacement on the water permeability, compressive strength, flexural strength, ultrasonic pulse velocity (UPV), connected porosity, total porosity, and density were examined. The results demonstrated that even though there is a decrease in the permeability, strength, and connected porosity of pervious concrete, the engineering properties still meet the standard requirements for pervious concrete, indicating the possibility of producing an eco-friendly concrete with a total replacement of natural aggregate with 100% MSWI-BA.