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| Effects of different types of warm-mixed agents on pavement performance of asphalt mixtures and its efficiency evaluation |
| 1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang′an University, Xi′an, Shaanxi 710064, China; 2. Zhejiang Highway and Water Transport Engineering Supervision Co., Ltd.， Hangzhou, Zhejiang 310004, China； 3. Shaanxi Transportation Holding Group Co., Ltd., Xi′an, Shaanxi 710038, China |
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Abstract To evaluate the effectiveness of different types of warm-mixed agents and recommend the applicable areas, the warm-mixed agents with different viscosity reduction mechanisms of PRLT, Sasobit, Aspha-min and HH-XⅡ were selected. SGC rotary compaction test, thermodynamic analysis and pavement performance test were carried out, and the effects of the types of warm-mixed agents on cooling effect, energy consumption and pavement performance of the asphalt mixture were investigated. The efficiencies of four warm-mixed agents were evaluated based on grey correlation theory. The results show that the mixing and compaction temperatures of SBS modified asphalt mixture can be reduced by four warm-mixed agents with different viscosity reduction mechanisms, and the best cooling effect can be obtained by PRLT with greatly reduced energy consumption. The high temperature performance can be improved by Sasobit, and Sasobit can be used in high temperature and heavy load areas. The low temperature and water stability performance can be improved by PRLT, but PRLT has adverse effects on high temperature performance, so it is suitable for asphalt pavement construction in seasonal freezing areas. Aspha-min asphalt mixture has the best low temperature performance and can be used in severe cold areas. HH-XⅡ has negative effect on the high and low temperature performance of asphalt mixture, while the water stability can be improved by HH-XⅡ, and HH-XⅡ can be used in areas with heavy rainfall. PRLT has the greatest correlation with the performance of warm mix mixture, and it has the best overall performance.
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Received: 17 March 2021
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2022, Vol. 43 
