ISSN: 0090-3973
Published Online: 18 January 2006
Page Count: 6

A Procedure to Quantify Organic Antistrip Additives in Asphalt Binders and Mixes
Chen, C
Graduate Research Assistant, and Associate Professors, North Carolina State University, NC

Tayebali, AA
Graduate Research Assistant, and Associate Professors, North Carolina State University, NC

Knappe, DRU
Graduate Research Assistant, and Associate Professors, North Carolina State University, NC

(Received 30 September 2004; accepted 13 October 2005)

Abstract

Stripping is a phenomenon of loss of bond or adhesion between the asphalt binder and the aggregate in asphalt mixes. Stripping frequently results from the presence of water, and most agencies require the use of antistrip additive to control moisture damage. However, there is no simple and quick method for detecting the presence and the amount or percentage of organic antistrip additive in asphalt binders or mixes. This paper presents a procedure based on solid-state spectrophotometry to detect qualitatively and quantitatively the presence of amine-based antistrip additive in asphalt binders and mixes. The developed procedure gives results that are quantifiable and reproducible with low coefficients of variation.

Keywords:
asphalt binder, asphalt mixes, antistrip additive, litmus test, spectrophotometer, color index

Paper ID: JTE12733
DOI: 10.1520/JTE12733
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