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Material Characterization and Performance Properties of Superpave Mixtures. Final rept. January 2001-December 2003.
| 题名： | Material Characterization and Performance Properties of Superpave Mixtures. Final rept. January 2001-December 2003. |
| 作者： | tayebali, a. a. huang, y. x. |
| 关键词： | *Hot-mix-paving-mixtures; *Material-tests; *Pavements-.;Asphalts-; Voids-; Fatigue-tests; Shear-tests; Pavement-design; Road-materials; Mechanical-properties; Research-projects; North-Carolina. |
| 摘要： | The primary objectives of this research study was to characterize properties of two NCDOT Superpave mixes with regard to fatigue distress, and to develop phenomenological fatigue relationships for these mixes based on various levels of strain, asphalt content, air void content, and temperatures. Of particular importance was the sensitivity of the Superpave mixes to asphalt content and air void content that are usually expected in-situ. Fatigue characterization of typical pavement sections using NCDOT fatigue models and using mechanistic analysis procedure suggests that the pavement fatigue life is sensitive to the mix variables and test temperatures considered in this study. A decrease in asphalt content by 0.5-percent (by wt. of mix) results in decrease of 18 to 25-percent fatigue life. An increase in 2%air void content reduced pavement life by about 40%for SP 12.5-mm mixes, and by almost 60%for SP 19-mm mixes. An increase in temperature was found to result in decrease in fatigue life of pavement section under consideration, although, fatigue testing was conducted in controlled-strain mode-of-loading. |
| 报告类型： | 科技报告 |
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