Effectiveness of anti-strip agents in asphalt mixtures.

Details

• Creators:
  Watson, Donald ; Moore, Jason R. ; Taylor, Adam J.
• Corporate Creators:
  Georgia Tech Research Institute ; Georgia Institute of Technology. School of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Asphalt mixtures
  • Antistrip additives
  • Moisture damage
  • Pavement performance
  • Hot mix paving mixtures
  • Evaluation
  • Granite
  • Calcium hydroxide
  • Field tests
  • Laboratory tests
  More +
• Publication/ Report Number:
  FHWA-GA-12-0623
• Resource Type:
  Tech Report
• Geographical Coverage:
  Georgia
• Corporate Publisher:
  Georgia. Department of Transportation. Office of Research
• Abstract:
  Since the late 1970s there has been much research performed to better understand the stripping phenomenon in asphalt mixtures. ; As a result, there have been changes in both materials and technology over the past 30 years to improve the resistance to moisture ; damage and the ability to test for performance under adverse moisture conditions. Due to the changes in materials and technologies ; related to the development and improvement of anti-strip agents, this research study was conducted to evaluate the effectiveness of ; current anti-strip agents used in hot mix asphalt pavements. ; One purpose of the project was to evaluate anti-strip agents with a variety of aggregates and mix types. Three granite sources ; were used: one does not have a history of stripping, one is a known stripping aggregate, and the other has used both hydrated lime ; and liquid additive in the past in order to meet tensile strength requirements. All granite sources were used in both 12.5 mm surface ; mixture and 25 mm base mixture. In addition, a limestone source was used in the 25 mm analysis to determine whether liquid ; antistrips may result in better performance than hydrated lime. Limestone was used only in the 25 mm mix because it is not ; typically used in surface mixtures due to a tendency to polish under traffic. ; Secondly, the past field performance of Georgia’s mixes designed with hydrated lime to the performance of Georgia’s mixes ; designed using liquid anti-strip agents was evaluated. Therefore, part of the study involved identifying projects with similar age, ; aggregate source, and mix type in order to make comparisons of performance for mixtures with liquid anti-strip with similar ; projects that used hydrated lime. ; Thirdly, a field test section was constructed where three different anti-strip agents were used in a conventional Superpave ; surface mixture. This was done on a typical mill and inlay project. ; A final objective involved conducting a series of laboratory performance test comparisons using different aging periods to make ; long-term comparisons of the effectiveness of hydrated lime to liquid and Warm mix anti-strip additives.
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• Format:
  PDF
• Funding:
  SPR00-0008-00-484
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28674/dot_28674_DS1.pdf
• File Type:
  [PDF - 2.73 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:c853183e45c800468ff2d3112f49de4378b9ded555a9dc532316540187bc5a0d