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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:

Evaluation of Novophalt as an Additive in Asphalt
Authors:
G. W. Maupin, Jr.
Year: 1991
VTRC No.: 91-IR6
Abstract: Novophalt, which is an ethylene vinyl acetate polymer, was used as an asphalt additive in a test section in an attempt to determine whether it is useful in the prevention of rutting. A special blending unit was required to blend the asphalt cement and polymer at the hot-mix plant; however, construction of the control and polymer test sections went smoothly with no problems. Various laboratory tests on the mixtures with and without polymer revealed some possible mixture deficiencies, which could cause pavement distress in the future. Measurements 10 months after construction revealed excessive rutting in one section containing polymer. A follow-up coring investigation revealed that most of the rutting was confined to the underlying base mixture and was caused by a lack of control of aggregate gradation and asphalt content.