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Evaluation of Rehabilitation Techniques for Flexible Pavements in Nevada; Research rept
| 题名： | Evaluation of Rehabilitation Techniques for Flexible Pavements in Nevada; Research rept |
| 作者： | Sebaaly, P. E.; Tabet, W.; Epps, J. A.; Rahman, M. |
| 关键词： | Flexible pavements; Concrete pavements; Rehabilitation; Nevada; Evaluation; Mix design; Moisture; Lime; Curing; Emulsion |
| 摘要： | The Nevada Department of Transportation (NDOT) is responsible for the maintenance and rehabilitation of a large number of highway miles, which fit within the categories of medium to low traffic volumes. The majority of these roads are remotely located throughout the state connecting small communications to larger metropolitan areas. Therefore, the condition of these roads is highly critical to the welfare of the state. Cold in place recycling (CIR) was used in Nevada during the 1970s and had proved to be an effective rehabilitation alternative for medium - low volume roads. Since the 1970s, significant changes have occurred in the equipment, materials, and methods of design. This research effort has investigated the effectiveness of CIR technology in rehabilitating Nevada's roads. The main objectives of the research were to develop a practical mix design procedure and to assess the need for an additive. The mix design process was developed using the Hveem mix design with some modifications to account for the need to evaluate the optimum moisture content and the evaluation of the rate of strength gain. Three different projects were designed and evaluated through the newly developed mix design procedure. The data from these projects indicated that the optimum moisture content could be safely assumed to be 3 and 4 percent for CIR mixtures without and with lime, respectively. Therefore, the development of the moisture-density curve for each CIR mixture is not necessary. |
| 总页数： | 72p |
| 报告类型： | 科技报告 |
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