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EFFECTS OF SAMPLE PRECONDITIONING ON ASPHALT PAVEMENT ANALYZER WET RUT DEPTHS.
| 题名： | EFFECTS OF SAMPLE PRECONDITIONING ON ASPHALT PAVEMENT ANALYZER WET RUT DEPTHS. |
| 作者： | Cross-SA; Voth-MD; Fager-GA |
| 关键词： | Aashto-; Aggregate-tests; Asphalt-mixtures; Asphalt-pavement-analyzer; Depth-; Moisture-susceptibility; Preconditioning-; Ruts-Pavements; Samples-; Stripping-Pavements; Tensile-strength; Tensile-strength-ratio |
| 摘要： | Moisture damage of asphalt mixes, better known as stripping, is a major distress affecting pavement performance. AASHTO T283 has historically been used to detect moisture susceptible pavements through the determination of a tensile strength ratio (TSR). Results from AASHTO T283 have been inconsistent. As a result there has been increased interest in finding an alternative test. Preliminary indications reveal that loaded wheel rut testers, such as the Asphalt Pavement Analyzer (APA) have the potential to detect moisture susceptible mixtures. To date, no standard test methodology has been developed. The objective of this study was to evaluate the effects of sample preconditioning on APA rut depths. Eight different mixes from seven project sites were evaluated with the APA. Samples were tested using four different preconditioning procedures: dry, soaked, saturated, and saturated with a freeze cycle. The results were compared with TSR values as well as other aggregate tests. The results indicate that the APA can be utilized to evaluate the moisture susceptibility of asphalt mixes. Additionally, the results indicate that harsher preconditioning of saturation and saturation with a freeze cycle did not result in increased wet rut depths. Using only dry and soaked conditioning appears to be adequate. |
| 总页数： | Conference Title: Mid-Continent Transportation Symposium 2000. Location: Ames, Iowa. Sponsored by: Iowa State University |
| 报告类型： | 科技报告 |
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