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| High temperature performance of warm mixed asphalt based on multi-stress creep recovery test |
| 1. School of Highway， Chang′an University， Xi′an， Shaanxi 710064， China； 2. Guangdong Hualu Communications Technology Co., Ltd.， Guang-zhou, Guangdong 510420， China; 3. Guangdong Road & Bridge Construction Development Co., Ltd.， Guangzhou， Guangdong 510623， China |
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Abstract Evotherm3G and EC120 warm agents were added into the matrix and SBS modified asphalt to prepare warm mixed asphalt. The multi-stress creep recovery test was used to evaluate the high temperature performance of warm mixed asphalt before and after short-term aging. The results show that the effects of two warm agents on the high temperature performance of asphalt are obviously different. By adding Evotherm3G warm agent,the strain of asphalt is increased, and the creep recovery rate of asphalt is decreased with improved non-recoverable creep compliance of asphalt. By adding EC120 warm agent,the strain of asphalt is decreased, and the creep recovery rate of asphalt is improved with decreased non-recoverable creep compliance of asphalt. Adding EC120 warm agent can improve the high temperature performance of asphalt better than adding Evotherm3G warm agent, while both warm agents can improve the stress sensitivity of asphalt with different degrees. The short-term aging improves the high temperature performance of matrix asphalt, but weakens the high temperature performance of modified asphalt.
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Received: 22 February 2019
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2020, Vol. 41 
