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Literature Review on Concrete Pavement Overlays Over Existing Asphalt Structures
| 题名： | Literature Review on Concrete Pavement Overlays Over Existing Asphalt Structures |
| 作者： | Kim, D. H.; Suliman, M. R.; Won, M. |
| 关键词： | Pavements##Pavement overlays##Pavement rehabilition##Pavement performance##Design procedures##Figures##Tables (Data)##Literature reviews##Concrete pavement overlays##Whitetopping##White topping## |
| 摘要： | The primary objective of this report is to summarize the findings of the literature review on the performance of whitetopping test sections and design procedures. Two questions face pavement engineers who consider using Portland cement concrete (PCC) overlays over hot mix asphalt concrete (HMAC): (1) Is the HMAC section in need of rehabilitation a good candidate for PCC overlay. (2) If it is, what should be the optimum PCC overlay structure, thin whitetopping (TWT) or full depth regular PCC pavement. To get answers to these questions, it is important to be able to properly evaluate the existing HMAC pavement for its ability to uniformly support PCC slabs. Without the ability to properly evaluate the supporting capability of HMAC pavement, its difficult to develop reasonable rehabilitation strategies. TxDOT developed design standards and special specification for thin white topping. However, TxDOT currently does not have guidelines or design procedures for the rehabilitation of HMAC showing rutting and shoving, with TWT. Several whitetopping projects were constructed over the years. The performance of these projects was investigated. They include test sections in Illinois, Minnesota, and Colorado. Several design procedures for whitetopping were reviewed: (1) Colorado whitetopping design procedures; (2) the Portland Cement Association design procedure developed by the Construction Technology Laboratories; (3) American Concrete Pavement Association design procedures; (4) design procedures developed by the New Jersey DOT, which were based on theoretical analysis. Review of these design procedures reveals that improvements are still needed for the proper and accurate determination of whitetopping pavement system. |
| 总页数： | 59 |
| 报告类型： | 科技报告 |
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