Warm-Mix Asphalt Study: Summary Report on Rubberized Warm-Mix Asphalt Research

Warm-mix asphalt (WMA) is a relatively new technology. Concerns exist about how lower production and placement temperatures could influence asphalt binder aging and short- and long-term performance, specifically rutting. The objective of this study was to identify limitations and benefits of using warm-mix asphalt technologies in rubberized asphalt mixes. Results suggest that warm-mix technologies can be used in rubberized mixes in California, provided that standard specified mix design, construction, and performance limits for hot-mix asphalt are met. The use of warm-mix asphalt technologies in rubberized asphalt mixes has clear benefits when compared to hot mixes including significant reductions in smoke and odors, lower emissions, improved workability, better working conditions, and better performance on projects with long hauls or where mixes are placed under cool conditions. The slightly higher costs of using warm-mix technologies are outweighed by these benefits. Based on the findings of this study, the use of warm-mix asphalt technologies in rubberized asphalt mixes is encouraged.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01530291
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Report/Paper Numbers: UCPRC-SR-2013-03, CA13-2385C
  • Contract Numbers: CA142385C, 65A0272
  • Files: CALTRANS, TRIS, ATRI, STATEDOT
  • Created Date: Jun 26 2014 5:05PM