Update Seal Coat Application Rate Design Method
| 项目名称： | Update Seal Coat Application Rate Design Method |
| 摘要： | A successful seal coat is one that provides over the design life, adequate surface texture and seals the pavement structure from water intrusion. There are design methods for seal coat application rates, however these design methods have been around since the 1960's and have not been updated. TxDOT typically uses experience to determine seal coat application rates. Unfortunately [due to rare use] the experience level is variable and loss of experienced personnel can lead to increased problems until experience is gained. Some of these problems are flushing, bleeding and rock loss. There are problems with underseals as well as surface seals. Poor underseals can lead to base failures and cause hot mix rutting. Contractors have also lost experience and in general will have less experienced personnel on small quantity seal coat projects. The disconnect from how the plan rates are established and the actual construction application rates can cause disputes on projects. An established design method can remove risk and result in better performing seal coat projects. Project objectives include evaluating current seal coat application rate design methods used by TxDOT district and evaluating materials used in seal coat and their influence on application rates. Researchers will propose a new design procedure or modified existing procedure. Better design methods will result in fewer problems and the the seal coat will be successful over its service life. |
| 状态： | Active |
| 资金： | $125000 |
| 资助组织： | Texas Department of Transportation |
| 项目负责人： | Jensen, Darrin |
| 执行机构： | Texas A&M Transportation Institute, College Station |
| 主要研究人员： | Goehl, Darlene C |
| 开始时间： | 20180901 |
| 预计完成日期： | 20210831 |
| 实际结束时间： | 0 |
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