HMAT: Hot Mix Asphalt Technology · 2003 · 18 citations · 0 references
EngineeringCivil EngineeringHydrologyGeoenvironmental EngineeringPavement EngineeringSoil MechanicsPavement ConstructionPavement DesignPavement GeotechnicsPavement MaintenancePavement MaterialsPaving SystemsAsphalt BinderMoisture Infiltration Into PavementsPavement ManagementRunoff DetentionRunoff RecoveryStormwater Runoff QualitySubgrade ImprovementSubgrade Preparation
Increasing regulation restricting stormwater runoff or requiring it to be captured and treated is driving development of new kinds of porous pavements that allow rain to migrate through the pavement surface and be collected and filtered by subsoil layers. Porous asphalt laid over an uncompacted subgrade can eliminate much runoff. Originally developed in the 1970s, it is well suited for parking lots, where porous asphalt has been performing well for some 20 years at mid- Atlantic sites. The underlying stone bed costs more to construct, but that can be offset by savings in piping and collection basins. The article discusses the background and costs of porous pavement, citing examples of successful installations and explaining how it works. It explores design considerations, and discusses issues such as soil and subsurface conditions, infiltration, water quality, construction, and maintenance.