Bituminous Concrete Overlay Studies

Report No: 71-R7

Published in 1971

About the report:

Deflection tests conducted on eight sections of primary highway, both before and after asphaltic concrete resurfacings, were analyzed as a study of the utility of such tests in the design of overlays. The application of tentative traffic and allowable deflection criteria showed that seven of the eight projects had deflections reduced to a satisfactory level by overlays of from 125 to 220 psy. It is likely that maintenance engineers would find deflection tests useful as decision making tools where the underlying pavement structure is unknown or of questionable quality. Other uses could include the definition of weight limits where unusual traffic or weather conditions prevail. It is recommended that the Research Council, in cooperation with the Maintenance Division, proceed with the development of an overlay design procedure which would include well defined traffic and structural parameters.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


  • Kenneth H. McGhee

Last updated: February 9, 2024

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