Details:

Creators:
You, Zhanping ; Goh, Shu Wei ; Dai, Qingli
You, Zhanping ; Goh, Shu Wei ; Dai, Qingli Less -
Corporate Creators:
Michigan Technological University
Corporate Contributors:
Michigan. Dept. of Transportation
Subject/TRT Terms:
[+]
Asphalt Mixtures Asphalt Pavements Asphalt Tests Laboratory Tests Warm Mix Paving Mixtures
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."


Format:
PDF
Funding:
RC-1556
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:ec543bda63c4e610ed18757356240058d4cde12d287ac29ff59309faaac25d52
Download URL:
https://rosap.ntl.bts.gov/view/dot/23692/dot_23692_DS1.pdf
File Type:

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