Feasibility of Substituting #78 for #8 Aggregate in S-5 Mixes

Report No: 80-R13

Published in 1979

About the report:

The study investigated the feasibility of using a coarse aggregate in the S-5 asphalt mixes. Virginia Department of Highways and Transportation specifications were adhered to with the exception of incorporating into the mix a small percentage of +1/2" material. A #78 aggregate was selected from three quarries in Virginia and substituted for the #8 aggregate in the S-5 mixes. In the design of the mixes, consideration was given to the gradation of material from each quarry, and tests were performed on the mixes using the Marshall method to determine the density, flow, stability, voids, and asphalt content. The results of tests on the mixes were compared graphically with Department specifications and the acceptability of each mix was determined.

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.


Other Authors

R. E. Boehling

Last updated: January 24, 2024

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