Review of a Bituminous Concrete Statistical Specification: Final Report

Report No: 70-R43

Published in 1971

About the report:

The statistically oriented specification for bituminous concrete production reviewed in this report was used as a basis for acceptance of more than one million tons of bituminous concrete in 1970. Data obtained from this system were analyzed for gradation and asphalt content for such comparisons as how well the production average matched the stated job mix formula; how well the variability of lot means matched the variability measure the limits were based on; and how well the range method of predicting the standard deviation matched the actual standard deviation. It was found that the 1970 bituminous concrete production was consistent with that of 1967, on which the specification was based; that the range method can predict standard deviations accurately and can be used on a lot-by-lot basis; and that, although the present tolerances are working well, there are some areas where improvements are possible.

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.

Authors

Other Authors

Stephen N. Runkle, Charles S. Hughes, P.E.

Last updated: February 12, 2024

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