Laboratory evaluation of warm mix asphalt.

Details

• Creators:
  You, Zhanping ; Goh, Shu Wei ; Dai, Qingli
• Corporate Creators:
  Michigan Technological University
• Corporate Contributors:
  Michigan. Dept. of Transportation
• Subject/TRT Terms:
  • Warm mix paving mixtures
  • Asphalt mixtures
  • Asphalt pavements
  • Laboratory tests
  • Asphalt tests
• Publication/ Report Number:
  RC-1556
• Resource Type:
  Tech Report
• Geographical Coverage:
  Michigan
• Corporate Publisher:
  Michigan. Dept. of Transportation
• Abstract:
  "Hot Mix Asphalt (HMA) has been traditionally produced at a discharge temperature of between ; 280°F (138°C) and 320° F (160°C), resulting in high energy (fuel) costs and generation of greenhouse ; gases. The goal for Warm Mix Asphalt (WMA) is to use existing HMA plants and specifications to ; produce quality dense graded mixtures at significantly lower temperatures. Europeans are using WMA ; technologies that allow the mixture to be placed at temperatures as low as 250°F (121°C). It is reported ; that energy savings on the order of 30%, with a corresponding reduction in CO2 emissions of 30%, are ; realized when WMA is used compared to conventional HMA. Although numerous studies have been ; conducted on WMA, only limited laboratory experiments are available and most of the current WMA ; laboratory test results are inconsistent and not compatible with field performance The main objectives of ; this study are: The main objectives of this study are: 1) review and synthesize information on the ; available WMA technologies; 2) measure the complex/dynamic modulus of WMA and the control ; mixtures (HMA) for comparison purpose and for use in mechanistic-empirical (ME) design comparison; ; 3) assess the rutting and fatigue potential of WMA mixtures; and 4) provide recommendation for the ; proper WMA for use in Michigan considering the aggregate, binder, and climatic factors. The testing ; results indicated that most of the WMA has higher fatigue life and TSR which indicated WMA has better ; fatigue cracking and moisture damage resistant; however, the rutting potential of most of the WMA ; tested were higher than the control HMA. In addition, the WMA design framework was developed based ; on the testing results, and presented in this study to allow contractors and state agencies to successfully ; design WMA around the state of Michigan."
  More +
• Format:
  PDF
• Funding:
  RC-1556
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/23692/dot_23692_DS1.pdf
• File Type:
  [PDF - 3.33 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:c855edb8af2e49d9da4416fa66c4f8ecf9acbec0a1a9c61aa04ce0be5bef87cbe04e793160696f6795f46ab0d2b4595357af604a2b1de82550166e605d036f3a