Impact of the coarse aggregate shape parameters on compaction characteristics of asphalt mixtures
| Autor: | Mehdi Shishehbor, M. Reza Pouranian, John E. Haddock |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Aggregate (composite)
Materials science General Chemical Engineering Flatness (systems theory) Compaction 02 engineering and technology 021001 nanoscience & nanotechnology Roundness (object) Sphericity 020401 chemical engineering Asphalt Particle 0204 chemical engineering Composite material Elongation 0210 nano-technology |
| Zdroj: | Powder Technology. 363:369-386 |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2020.01.014 |
| Popis: | In this study, the effect of coarse aggregate shape characteristics on the compactability and microstructural properties of asphalt mixtures was virtually investigated using a discreet element method (DEM). Results reveal there is a statistically significant correlation between coarse aggregate flatness, elongation, roundness, and sphericity as shape descriptors and initial asphalt mixture density, as a compaction parameter. Analyses indicate that among all particle shape descriptors, only roundness and regularity had a statistically significant relation with compaction slope, and as the amount of roundness and regularity increase, the compaction slope decreases. Additionally, flatness and elongation values >0.75 result in lower average coordination number values compared to those values |
| Databáze: | OpenAIRE |
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