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Surface Pavement Solutions for Poor Subgrade Conditions.
| 题名： | Surface Pavement Solutions for Poor Subgrade Conditions. |
| 作者： | sobhan, k. |
| 关键词： | cracking, distortion, reconstruction, high costs, rehabilitation strategies, cost-benefit analysis |
| 摘要： | The western and northern parts of District 4 and 6 have shallow layers of organic and plastic soils under existing roads. These roads often exhibit large amount of cracking and distortion in a short period of time. Traditional repairs are often not practical due to high costs and extended construction time, as they require complete reconstruction of the roads with surcharge or removal of the unsuitable soils materials. The problems compound when right of way and maintenance of traffic are involved. Less expensive solutions applied to the pavement surface are needed. Recent advances in pavement design allow use of geogrids under the base and above the subgrade. These techniques are not surface solutions and require removal of the pavement and base. Therefore, there is an identified need to develop repair procedures that only apply to the asphalt surface layer called 'Surface Pavement Solution' or SPS. The broad objectives of this research endeavor are to identify and evaluate various rehabilitation strategies and techniques that can be readily applied to the pavement surface course extending the life of the roadway. An integrated cost-benefit analysis will be performed for selecting the optimum Surface Pavement Solutions. / NOTE: Final rept. / Supplementary Notes: Sponsored by Florida State Dept. of Transportation, Tallahassee. Research Center. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0715；174p |
| 报告类型： | 科技报告 |
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