Use of Recycled Construction and Demolition Materials inPavementEngineering

Abstract

The disposal of construction and demolition (C&D) waste poses significant environmental and economic challenges worldwide.Conventional disposal methods such as landfilling lead to land scarcity, soil contamination, and greenhouse gas emissions. Recyclingdemolitionmaterials as pavement construction materials of ers a sustainable alternative, reducing the consumption of natural aggregates andmitigatingenvironmental impacts. This paperreviews the properties, processing, and performance of recycled concrete aggregates (RCA), reclaimedasphaltpavement (RAP), brick debris, and mixed C&D waste in flexible and rigid pavements. Laboratory and field studies demonstrate that appropriatelyprocessed demolition materials can meet the mechanical and durability requirementsfor base,sub-base, and surface layers. The reviewhighlightsfactors af ecting performance,such as particle size,moisture content, treatmentmethods, and binder compatibility.Challenges, includingvariabilityin material properties, contamination, and regulatory limitations, are discussed. Future research directions focus on optimizingmixdesigns,enhancing mechanical performance, and developing standards for large-scale implementation. This study emphasizes the potential of demolitionmaterialsto contribute to sustainable, cost-ef ective, and environmentally responsible pavement construction