United States Department of Transportation
i
Improving the Use of Crack Sealing to Asphalt Pavement in Louisiana
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2020-06-01
[PDF-3.30 MB]
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Edition:2016-2019
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Abstract:The use of crack sealing in Louisiana has been limited as studies conducted in the 1960s showed that the performance of this maintenance practice can be affected by shallow groundwater table conditions in the state. The objective of this study was twofold. First, this project quantified the short-term and long-term benefits of using crack sealing, chip seal, and microsurfacing. Furthermore, this project assessed the optimal application timing of crack sealing, chip seal, and microsurfacing. Second, this project evaluated potential moisture damage in pavements treated with crack sealing, chip seal, and microsurfacing. Results showed that crack sealing could be applied in Louisiana for any groundwater table depth without the potential for moisture damage given proper design and construction. On the other hand, microsurfacing should be avoided in areas with shallow groundwater table as it could contribute to moisture damage in asphalt pavements due to moisture entrapment. To facilitate implementation of the results, a user-friendly tool was developed in the form of a spreadsheet that could be used by the Department during planning and design of maintenance activities.
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