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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.

Title:

Problems in Achieving Density in Asphaltic Concrete: Final Report
Authors:
G. W. Maupin, Jr.
Year: 1979
VTRC No.: 79-R31
Abstract: This investigation was undertaken in an attempt to identify the causes of low densities in asphaltic concrete placed on 9 projects. The most prevalent cause, which accounted for the difficulties on 5 of the 9 projects, appeared to be improper mix design and/or variability within the aggregate. The use of travel speeds in excess of that specified for the rollers employed was the second most prevalent cause of trouble. Means by which field personnel can determine the causes of low densities are given in the report.