摘要: |
Asphalt mixtures are a combination of asphalt binder and a variety of nonbituminous materials. In addition to aggregates, which constitute the largest volume of asphalt mixtures, nonbituminous materials used in paving mixtures include: mineral and other fillers, including carbon black; waste materials, including rubber, reclaimed asphalt pavement (RAP), shingles, glass, plastic, and toner; aggregate substitutes (slag, manufactured lightweight materials); polymers; fibers; lime; sulfur; antistripping agents; antioxidants; hydrocarbons; oxidants; and extenders. The use of such materials is discussed here, and some are categorized as value-added recovered or reprocessed materials, waste products, or byproducts. The use of a number of other components is also discussed, as are anticipated future trends in the use of nonbituminous components in bituminous paving mixtures. |