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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:

Survey for Reactive Blends of Asphalt and Antistripping Additives: Final Report
Authors:
G. W. Maupin, Jr.
Year: 1983
VTRC No.: 83-R33
Abstract: When subjected to elevated temperatures, some blends of asphalts and antistripping additives undergo a reaction that causes the additive to be ineffective. The frequency of occurrence of reactive asphalt-additive blends used by the Virginia Department of Highways and Transportation was determined to ascertain the level of testing that is necessary to prevent acceptance of their use in asphaltic paving mixtures. Samples of asphalt cement were collected, combined with the two additives used most frequently by the Department, heat treated, and tested. Bottle and stripping tests were used to evaluate the reactivity of the blends. Although approximately 50% of the asphalts reacted with an additive, the reactions were not detrimental when normal additive doses were used. It was concluded that no modifications to the present test procedures and frequency of tests are needed.