Abstract
This paper investigated the influence of grading curve trend on the air voids in asphalt mixtures. A total of 11 asphalt mixtures with different grading curve traits and an asphalt binder content were studied. The test data illustrated that the aggregate gradation had a significant influence on the air voids in asphalt mixtures. With the fine aggregate changing from fine to coarse, air voids increased gradually. The air voids was the least when the coarse aggregate grading nears to the maximum density aggregate grading, and was the most when the coarse aggregate grading nears to the upper limit. With the aid of rank sum test, the sensitivity of air voids to the change of aggregate grading was studied. The results presented that in asphalt mixtures the change of any of the coarse aggregate, fine aggregate and 4.75 mm percent passing affected the air voids. The finding also indicated that the variation of fine aggregate was the most significant factor to the change of air voids in asphalt mixtures.
| Original language | English |
|---|---|
| Pages (from-to) | 458-462+466 |
| Journal | Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) |
| Volume | 36 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jun 2012 |
| Externally published | Yes |
Keywords
- Air voids
- Asphalt mixture
- Grading curve trend
- Rank sum test
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