Effect of Aggregate Gradation Constitution on Engineering Properties and Pavement Performance of Asphalt Mixture
| Autor: | Kuo Ming-Feng, 郭銘峰 |
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| Rok vydání: | 2004 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 92 Effect of Aggregate Gradation Constitution on Engineering Properties and Pavement Performance of Asphalt Mixture Dissertation Advisor: Der-Hsien Shen Ph.D. Student: Ming-Feng Kuo This study is to investigate the effects of aggregate gradation constitution on the engineering properties and pavement performance. The gradation is applied to dry packing, in accordance with ASTM D3515 and criteria of Ministry of Transportation and Communication. Intelligent selection system (ISS) and traditional method are conducted to analysis the engineering properties and pavement performance that establish in gradation constitution and aggregate content groups. Based on test results, IVb gradation are denser than IVc gradation in aggregate gradation constitution group. Omitted sieve size of No.4(4.75mm) and control of IVb and omitted sieve size of 3/8”(9.5mm)for IVc have maximum VDA. Omitted sieve size of No.8 for IVb and omitted sieve size of No.4 have optimum engineering properties. However, increasing flow and slips between aggregates are caused by too much asphalt content in minimum VDA. This study is performed using grey model to predict engineering properties of gradation constitution group. The results show that fine aggregate constitution provided better construction predicted model. Traditional and Rolled model are more precise than Non EquiGap model in this study. Based on the pavement performance test analysis, omitted sieve sizes of No.200 and No.8 for IVb and omitted sieve sizes of 3/4” and 3/8” for IVc have optimum pavement performance, omitted sieve sizes of No.30 and lime for IVb and IVc have worth pavement performance. However, ISS model is more objective than traditional method. In aggregate content group, when the ratios of coarse and fine aggregate contents (ACR) increased the VDA has increased, and the ratios decreased the VDA has increased as well. The properties of asphalt concrete mixtures become worse.. In view of pavement performance, the ability of resistant skid is increased by ACR increasing and rutting test results shows that higher ACR values have lower rut depth. The other hand, lower ACR values have higher rut depth. Resilient modulus of IVc gradation is more than IVb’s, and MR decreased by ACR increasing. The MR for low ACR is more than MR for high ACR. The ACR for better performance is recommended between 1 and 2. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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