Designing Base and Subbase to Resist Environmental Effects on Pavements

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Status:  Complete
Report Date:  02/14/2018


Researchers studied records on Minnesota roadways, subgrades and regions for frost susceptibility and pavement performance, and examined related data from the Federal Highway Administration's Long-Term Pavement Performance program (LTPP). After conducting pavement profiles in summer and late winter and correlating findings with LTPP data, investigators developed a simple design tool for determining the amount of frost-free materials a specific site's subgrade will need to prevent frost and freeze-thaw damage to pavements. MnDOT can select a version of this simple and inexpensive new tool for pilot implementation.

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