Abstract

This report documents the selection and sampling of 21 long-term pavement performance testing sites. Seven of those sites were also chosen to be a part of the LTPP portion of the Strategic Highway Research Program (SHRP). All sites were sampled in accordance with SHRP protocol and procedures.

The report includes three years of visual distress data and pavement deflection data obtained by a Road Rater. There were wide variabilities in backcalculated subgrade moduli and asphaltic concrete moduli within each 500-foot test section.

Laboratory resilient modulus tests were performed on undisturbed samples of the subgrade and asphaltic concrete cores. Again, there was wide variability between laboratory resilient moduli and backcalculated moduli from field deflection.

A number of models were developed to permit estimation of pavement distresses with time, AADT's, or ESAL's. In addition, relationships were developed between laboratory and field data.

It is recommended that longer-term data be obtained, to refine the models and to make their estimations more accurate. The models developed in this study can estimate the service history of a pavement.

Report Date

7-1992

Report Number

KTC-92-10

Digital Object Identifier

http://dx.doi.org/10.13023/KTC.RR.1992.10

Notes

The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky, the Kentucky Transportation Cabinet, nor the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. The inclusion of manufacturer names and trade names are for identification purposes and are not to be considered as endorsements.

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