Author: Melake A. BrhanemeskelPublisher:
ISBN: 9780438403093
Category : Concrete
Languages : en
Pages : 119
Book Description
The Wyoming Department of Transportation (WYDOT) has been working to fully implement MEPDG as their pavement design guide. To facilitate this implementation, many research works have been completed. Similarly, this thesis was completed to evaluate the relationships between subgrade resilient modulus (Mr ) and the dynamic cone penetration (DCP) and the standard penetration test (SPT) results, select three best subgrade Mr predictive models based on both Mr and distress estimations, determine the sensitivity of the pavement design parameters on pavement distresses in Wyoming, and facilitate implementation of the MEPDG in the state of Wyoming. Two resilient modulus (Mr) predictive models were developed from the dynamic cone penetration (DCP) and the standard penetration test (SPT) results. To enhance the prediction of pavement performance distresses, 11 subgrade Mr predictive models were evaluated and three best models were identified and selected. Sensitivity of pavement distresses to influential variables was assessed. All pavement distresses were found to be sensitive to asphalt concrete thickness, and most of the distresses were found to be non-sensitive to asphalt concrete (AC) grade, base thickness, and base Mr. Finally, pavement design comparisons were made between the WYDOT 2012 user design guide and the recommended design guide based on locally calibrated properties. The average overall cost per square yard of the pavement structure designed using the WYDOT 2012 user design guide was found to be 21% higher than that based on the recommended design guide.
