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In recent years, the increasing need for recycling has forced highway engineers to search for more innovative and economical methods of building and maintaining the nation's highways. There is an urgent need to find ways to recycle waste materials (e.g., tires) to reduce the amount of waste going into landfills each year. In this review of the existing technology, the feasibility of the use of scrap tires in flexible pavements was investigated. An extensive literature review was conducted. In addition, an extensive survey of all state and federal highway-related agencies was performed. Based on the literature review and surveys, several recommendations were submitted to the South Carolina Department of Highways and Public Transportation and Federal Highway Administration officials.
waste tires, flexible pavements, rubber, SAM, SAMI, dry and wet process
Assistant Professor, Clemson University, Clemson, SC