Research Article
Evaluation of Permanent Deformation of Unmodified and Rubber-Reinforced SMA Asphalt Mixtures Using Dynamic Creep Test
Table 8
Three-stage models and boundary points for control and modified mixtures at 400 kPa stress.
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Test temperature |
Sample | Primary stage | Secondary stage | Tertiary stage | Model | End point | Measured strain, s | Predicted strain, s | Model | End point | Model |
|
40°C | Control | = 4088N0.2949 | = 469 | 25185.27 | 25074.93 | = 25074.93 + 15.1 (-469) | a | a | 12R | = 3740.9N0.2823 | = 979 | 26216.27 | 26138.10 | = 26138.10 + 7.977 (-979) | a | a | 12R 4.5V | = 2891.4N0.277 | = 647 | 17659.15 | 17367.15 | = 17367.15 + 7.19 (-647) | a | a |
|
50°C | Control | = 5146.9N0.307 | = 169 | 25046.38 | 24860.33 | = 24860.33 + 39.439 (-169) | = 829 | = 50890.1 + 2789.6() | 12R | = 4100.3N0.2983 | = 599 | 27859.29 | 27626.26 | = 27626.26 + 14.184 (-599) | a | a | 12R 4.5V | = 3923.8N0.2462 | = 269 | 15792.31 | 15556.50 | = 15556.5 + 14.162 (-269) | a | a |
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Not found at the end of 1800 load cycle.
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