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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:

Effect of Glass Concentration on Stripping of Glasphalt
Authors:
G. W. Maupin, Jr.
Year: 1998
VTRC No.: 98-R30
Abstract: Virginia allows up to 15 percent glass to be used in asphalt concrete. However, a literature search revealed that there is not much test data to substantiate this quantity. Because of the smooth surface texture of glass particles and the associated risk of stripping, it is desirable not to incorporate too much glass. The purpose of this laboratory study was to determine the maximum amount of glass that can be used in glasphalt without sacrificing stripping resistance. Two mixes, each containing chemical and hydrated lime antistripping additives, were made at several glass contents. The tensile strength ratio (TSR) test (AASHTO T283) was used to assess stripping resistance of the mixes. Both additives produced adequate stripping resistance with the exception of the mix containing 20 percent glass and chemical additives. Based upon the results of the TSR stripping test as a performance indicator, it was found that using up to 15 percent glass in glasphalt is acceptable.