Development of Test Procedure for the Design of Black Base: Final Report

Report No: 76-R62

Published in 1976

About the report:

There is no standard design procedure available for black base mixes containing aggregates larger than 1" (25.4 mm) This investigation dealt with the use of stability testing equipment similar to that used in the design of surface mixes and development of a compaction procedure for 6" (152. 4 mm) diameter specimens. A compaction procedure was developed that could be used with slight modification to duplicate field densities. The trends of the VTM and VFA curves appear promising as an indicator of the proper asphalt content; however, the inherent variability of the stability measurement eliminates it as a design criterion.

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.


  • G. W. Maupin, Jr., P.E.

Last updated: January 29, 2024

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