ABSTRACT
This chapter provides an overview of the benefits and challenges of recycling in the 21st century focuses on the use of recycled materials in hot mix asphalt and Warm mix asphalt. It focuses on achieving sustainability in asphalt pavements, which is a major component of transportation infrastructure in the United States. The chapter also provides a brief overview of other existing and evolving materials and technologies, namely cold-in-place recycling, micro-surfacing, bio-binders, rice husk ash, fly ash, cement kiln dust, blast furnace slag, steel slag, and crushed glass. Dynamic modulus, creep compliance, four-point bending beam, indirect tensile strength ratio, and Hamburg wheel tracking tests were conducted on the asphalt mixes to evaluate their performance and to determine input parameters for pavement design. One cost-effective and environmentally friendly method of choice in rehabilitating distressed asphalt pavements is cold in-place recycling. It is performed at a construction site without hauling the milled materials to a central processing plant.
