Strength of Virginia's 12-inch and 34-inch Asphalt Surface Mixtures

Report No: 93-R9

Published in 1993

About the report:

This study was undertaken to measure what, if any, differences exist in strength between mixtures made with 3/4-in (19-mm) maximum size aggregate and those made with 1/2-in (13-mm) maximum size aggregate. In order to make a comparison, a definition of equivalent gradation was necessary. This definition used a constant slope, n, of the log percent passing versus the log sieve size. Tests included gyratory shear, creep, resilient modulus, indirect tensile strength, and failure strain. It was concluded that with the gradations and aggregates studied, the type of aggregate is a more significant source of difference in strength than either aggregate maximum size or the gradation used.

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.


  • Charles S. Hughes, P.E.

Last updated: December 24, 2023

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