• Quantifying Anti-Strip Additive in Asphalt (Binder & Mixes)

    NCDOT Research Project Number: 2004-05

Executive Summary

  • NCDOT requires anti-strip agent in all asphalt mixes. To date, there is no test procedure to determine the level of organic anti-strip agents in asphalt binders or asphalt mixtures. A reliable standardized test procedure will allow NCDOT to determine if the specified level of organic anti-strip agent has been added to the mix and hence, reduce the amount of substandard asphalt mix being placed in the field. It will also allow NCDOT and asphalt manufacturers to have a quality control test to inspect asphalt binders and hot mix samples. ​

    The objective of this research will be to develop a reliable and repeatable laboratory and/or field test procedure to determine the amount of organic anti-strip agent in asphalt binders and asphalt mixtures. In this investigation, two test methodologies will be investigated. These include 1) a colorimetric test, and 2) a litmus test using the StripScan device. Both methodologies utilize a spectrophotometer for the analysis of anti-strip additive concentration in asphalt mixes.​

    The anticipated research product will include a reliable test procedure that can be used by NCDOT as well as asphalt manufacturers for quality control testing to inspect asphalt binders and hot mix samples to determine if the specified level of anti-strip agent has been added to the mix.

  
Researchers
  
Akhtarhusein A. Tayebali; Detlef Knappe
  
Jack Cowsert
  
Mustan Kadibhai, PE, CPM

Related Documents

Report Period

  • July 2003 - December 2004

Status

  • Complete

Category

  • Pavement, Materials and Maintenance

Sub Category

  • Pavement Performance

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