A Review of the Recycling of Construction and Demolition Wastes in Asphalt Pavement

The construction and maintenance of roads in China require large amounts of aggregates and mineral filler. The use of recycled materials helps conserving natural resources. However, the inferior road performance and additional costs have hindered the widespread use of construction and demolition wastes (C&D wastes) in applications such as surface layers of asphalt pavement that may represent a value application for C&D wastes. Waste concrete, waste bricks and waste glass are selected for this study; and the surface layers of asphalt pavement is considered here as value application. Although there is a large potential for supplying C&D wastes now, a few barriers have effectively depressed the recycling activities. Such barriers are described here and a brief discussion suggests ways of their removal.