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State-of-the-Practice in Chip Seal, Slurry Seal, Micro Surfacing, and Thin Lift Asphalt Overlay Construction Quality Assurance.
| 题名： | State-of-the-Practice in Chip Seal, Slurry Seal, Micro Surfacing, and Thin Lift Asphalt Overlay Construction Quality Assurance. |
| 作者： | Hajj, E. Y.; Graham, L.; Heitzman, M. A.; Hand, A. J.; Weitzel, D.; Tran, N. H. |
| 关键词： | Pavement preventive maintenance, Flexible pavement, Chip seal projects, Surface treatment, Asphalt concrete, Specification, Requirements, Maintenance (upkeep), Thin Lift Asphalt Overlay |
| 摘要： | This project summarizes current quality assurance “best” practices used by selected public agencies for constructing successful Chip Seal, Slurry Seal, Micro Surfacing and Thin Lift Asphalt Overlay pavement preventive maintenance treatments. These practices are considered “best” practices, as such practices, when adhered to, lead to long-lasting and high-quality preventive maintenance treatments. A key finding from this study was the appreciable difference in practices with changes in climate zones, particularly for Chip Seals. The main difference was observed in the type of asphalt binder to be used. There were also several similarities between the treatments, particularly between the micro surfacing and slurry seal treatments. Another key area of importance was the apparent inconsistency in specifying calendar date limits for construction for some agencies, even ones that would encounter undesirable weather conditions. This finding indicates that either dates need to be specified for increased treatment performance, or that there are some practices that are in place that may not be in the specifications—or noted during interviews—but can still lead to quality preventive maintenance treatments. Differences in the equipment specification details existed between agencies. Some agencies indicated extensive method specification details, whereas others indicated more broad specification details. Further, while the construction process itself was similar among the agencies for each treatment, the inspection processes followed by each of the agencies for all four treatments showed remarkable diversity in the actual process followed and the general requirements for inspection, including test strip requirements. Some agencies did not require test strips at any time before, during, or after construction. Some agencies determine opening to traffic times based upon the type of roadway that was treated, which seems to take the effect of traffic into consideration. |
| 报告类型： | 科技报告 |
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