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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:

Cold Weather Paving Requirements for Bituminous Concrete
Authors:
G. W. Maupin, Jr.
Year: 1973
VTRC No.: 72-R24
Abstract: Cold weather paving specifications were developed from work by Corlew and Dickson, who used a computer solution to predict the cooling rate of bituminous concrete. Virginia had used a minimum atmospheric temperature as a criterion; however, it was evident that other factors had a significant effect, so the computer solution was considered as a possible basis for new specifications. Although the solution had been checked by field measurements it was decided to obtain further verification by plotting cooling curves for freshly placed hot mix. The curves were developed by measuring the cooling rates of bituminous mats of varying thicknesses under a variety of weather conditions. The field measurements verified the computer solution, and it was used to develop new cold weather paving specifications. The first specification, put into effect in 1970, was written in tabular form using the laydown temperature and mat thickness as criteria. This specification was modified and put into the form of a simple nomograph.