Field performance evaluation of stone interlayer pavement in Louisiana

In this study, field performance of a stone interlayer pavement test section and cement-stabilised base test control section on LA-97 in Acadia Parish, Louisiana, was monitored during 20 years of service. In addition, the performance of other nine stone interlayer pavement sections in Louisiana constructed from 1999 to 2008 was monitored and evaluated. Field evaluations in this study included distress surveys on all 11 pavement sections, and non-destructive evaluation of pavement structure by the falling weight deflectometer and the dynamic deflection determination system test on nine of these sections. The field evaluation results indicated that the stone interlayer test section on LA-97 had a superior pavement performance to control section over the 20 years of service, and other nine stone interlayer pavement sections were in good pavement condition after 2.5–12 years of service.

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