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https://hdl.handle.net/11681/9528| Title: | Asphalt concrete for cold regions : a comparative laboratory study and analysis of mixtures containing soft and hard grades of asphalt cement |
| Authors: | University of Illinois. Dempsey, Barry J. Ingersoll, Jonathan E. Johnson, T. C. (Thaddeus C.) Shahin, Mohamed Y. |
| Keywords: | Asphalt cement mixtures Asphalt concrete tests Catalytic cracking Pavements Traffic cracking and rutting Cold weather conditions |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | CRREL report ; 80-5. |
| Description: | CRREL Report Abstract: Pavements containing soft asphalt cement have been shown in the past to be less susceptible to low-temperature contraction cracking, but more susceptible to traffic-load-associated distress in warm weather, than pavements with harder asphalt cements. This research comprised laboratory testing to determine the properties of asphalt-aggregate mixtures containing three grades of asphalt cements, and analyses to project the performance of pavements containing each of the asphalts, in resisting thermally induced distress and traffic-associated distress. From the results it is concluded that only the softest asphalt cement tested (AC 2.5) would perform satisfactorily in a cold climatic zone. The moderately soft (AC 5) and moderately hard (AC 20) asphalt cements showed little susceptibility to thermal cracking in a moderate and a warm climatic zone, respectively. The AC 2.5 and AC 5 asphalts are not recommended for use in warm climates, however, owing to increased susceptibility to rutting under traffic. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/9528 |
| Appears in Collections: | CRREL Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CR-80-5.pdf | 1.42 MB | Adobe PDF |  View/Open |