Assessment of Warm Mix Technologies for Use with Asphalt Rubber PavingApplications

摘要

Warm mix asphalt (WMA) is the name given to certain technologies that reduce the productionand placement temperatures of asphalt mixes. In the United States, WMA is a relatively newtechnology; however, European countries have used this technology since the mid 1990’s.Asphalt Rubber (AR) has been used in the United States since 1960s. The field blended asphaltrubber normally requires higher production and compaction temperatures. This paper evaluateswhether there are any benefits of using warm mix technologies with AR hot mixes. The potentialsavings in energy and reduction in Green House Gas emissions could be great.The paper includes a brief literature review and a survey of users of WMA in the United States.Then it concentrates the research on the use of warm mix technologies with AR in Californiaincluding, Route 152 near Santa Clara, Interstate 5 near Santa Nella, Interstate 5 near Orland,CA-94 in San Diego, SR-101 in Fortuna, SR-70 in Marysville, SH 99 in Sutter County.The overall field testing and research results demonstrate that there are a wide range of benefitswhich can be attained by using warm mix technology in AR mixes. These may include reducedfuel usage and emissions, compaction aid, longer paving season, night paving, long haulingdistances, and improved working conditions.