United States Department of Transportation
i
Forensic Evaluation of Pavement Structure: Ponderosa Drive in East Baton Rouge Parish
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2022-01-01
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[PDF-3.61 MB]
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Edition:August 2020-August 2021
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Abstract:The objective of this forensic investigation was to determine possible causes of the early pavement deterioration at Ponderosa Drive in East Baton Rouge Parish. The study comprised of pavement and geotechnical evaluation to determine structural strength of the pavement and subsurface layers. Further, asphalt field cores were obtained for subsequent laboratory evaluation. The pavement research group conducted rutting and structural evaluation of the pavement section utilizing the profiler and falling weight deflectometer (FWD), respectively. Rut depths were found to be greater than 0.75 in. at specific locations along the pavement section. FWD deflection data showed that the pavement structure is in poor condition with possible large variations in subgrade support. In addition, the asphalt layer for the pavement section was found to exhibit stiffness values within the range of values reported by other researchers for a typical asphalt concrete. Possible causes of the rapid deterioration of the pavement section include higher levels of traffic, non-homogeneous cement treated base, weakening of pavement structure due to the August 2016 floods, and the subsequent use of the road section by heavier waste disposal trucks to remove flood debris. It is recommended that the entire pavement section be reconstructed with a design that ensures that the prevailing traffic is considered.
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