Reducing Low-Temperature Cracking on Local Roads
| 项目名称： | Reducing Low-Temperature Cracking on Local Roads |
| 摘要： | Traffic volumes on local roads (e.g., counties, townships, municipalities) differ significantly from traffic volumes on state roads (e.g., state routes, interstates). State roads tend to experience significantly higher average daily volumes of truck traffic than local roads. While 50 trucks per day may be considered low truck traffic volume on a rural state road, on a rural local road 50 trucks per year can be a more accurate representation. As a result, the design needs and distress challenges on local roads can differ from state roads. Low-temperature or thermal cracking is one of the main distresses in asphalt pavements with low to medium traffic volumes. This leads to a significant reduction in the service life and performance of these roads. Low-temperature cracking is also a source of reflective cracks in overlays placed on asphalt pavements. The properties of the binder in asphalt mixture significantly affect its resistance to low-temperature cracking. In addition, the aggregate shape, type and properties as well as the coefficient of thermal expansion of the asphalt mixtures plays a major role in the development of low-temperature cracking and control the mixture resistance to this type of cracking. There are a variety of asphalt mixes available to be used on local roads. Local Public Agencies (LPAs) need recommendations for mixture specifications that will help limit the development of low-temperature cracking on local roads. The goal of this research is to identify asphalt mixtures designed for low weather cracking for low volume roads on Ohio's local transportation system. This research will determine changes needed in the specifications of local roads asphalt mixtures and their components (aggregate and binder) to improve the mixtures resistance to low-temperature cracking. This research may lead to modified mixes or new mixes with better low-temperature performance. The results of this research are expected to help LPAs to improve the service life and performance of their roads and reduce their life cycle cost. |
| 状态： | Active |
| 资金： | 197200 |
| 资助组织： | Federal Highway Administration |
| 管理组织： | Ohio Department of Transportation |
| 项目负责人： | Fout, Vicky |
| 执行机构： | University of Cincinnati |
| 主要研究人员： | Nazzal, Munir D. |
| 开始时间： | 20221024 |
| 预计完成日期： | 20240624 |
| 主题领域： | Highways；Materials；Pavements |
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