Synthesis of Warm Mix Asphalt Paving Strategies for Use in Montana Highway Construction

摘要

Warm Mix Asphalt (WMA) used as an alternative to conventional Hot Mix Asphalt (HMA) has gained national prominence. WMA uses technological advances that reduce the temperature needed to produce and compact asphalt for the construction of pavements, which results in lower costs, improved worker health, increased safety and reduced environmental impacts. Twelve WMA technologies are currently identified. Significant work has been conducted to demonstrate construction practices and to develop mixture design procedures. Twelve states currently have specifications for WMA. The report summarizes work performed to date that is pertinent to Montana DOT's desire to move forward with implementation of WMA. Recommendations are given for research and implementation activities that should be followed to more broadly employ WMA technologies as a standard paving practice in Montana.