How well does pervious pavement work? Is it durable?
The key difference between conventional concrete and asphalt pavements compared to pervious pavements is that the smallest stone particles, or fines, are left out of the pervious pavement mixture. This leaves small voids that allow water to infiltrate through the pavement. However, these pore spaces do slightly reduce the durability of the pavement in comparison with conventional pavements. Therefore, pervious pavements should be used strategically in areas with low vehicular traffic like parking stalls in parking lots or pedestrian and bicycle pathways. With proper design, construction, and maintenance, pervious pavement works well for many years, including in winter weather. Black ice does not form on pervious asphalt, as any thawed water infiltrates; thus, pervious asphalt can help prevent slip and fall accidents. The admixtures and binders selected will have significant impact on the pavement’s effectiveness. Refer to the NJDOT specifications and National Ready Mixed Concrete Association for design guidance. Durability varies based upon the type of pervious pavement system selected. For grass pavers, gravel systems, resin-bonded aggregates and various other products, consult manufacturer guidelines for construction and maintenance procedures