Recycled construction and demolition materials in permeable pavement systems: geotechnical and hydraulic characteristics

The increase in generation of waste from human and construction activities along with significant increase in population has led to major issues over waste disposal. The reuse of waste material is an important topic from both sustainability and economic point of view. In this paper, application of Construction and Demolition materials (C&D) in road works is reviewed and discussed. C&D material were evaluated by laboratory testing methods to assess their viability for reuse in roads and footpaths. Several unique field case studies where C&D materials have been used are also reported. The environmental risks associated with use of C&D materials in road is also discussed. The types of Construction and demolition wastes that were studied include Recycled Concrete Aggregate (RCA), Crushed Brick (CB), Reclaimed Asphalt Pavement (RAP), Fine Recycled Glass (FRG) and Waste Rock (WR). C&D materials were found to be suitable for road and footpaths applications such as embankment fills, pavement base/subbase and pipe bedding applications.