Effect of prolonged heating on the asphalt-aggregate bond strength of HMA containing liquid anti-strip additives

Details

• Creators:
  Tayebali, Akhtarhusein A. ; Knappe, Detlef R. U. ; Mandapaka, Venkata Lakshman
• Corporate Creators:
  North Carolina. Dept. of Transportation. Research and Analysis Group ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Hot mix asphalt
  • Aggregate tests
  • Aggregate mixtures
  • Asphalt mixtures
  • Bond strength (Materials)
  • Heating (Structures)
  • Liquid asphalt
  • Antistrip additives
  • Asphalt Binder
  • Asphalt Mix
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• Publication/ Report Number:
  FHWA/NC/2007-08
• Resource Type:
  Research Paper
• Geographical Coverage:
  United States
• Edition:
  Final Report; 07/01/2006-06/30/2008
• Corporate Publisher:
  North Carolina State University. Dept. of Civil, Construction, and Environmental Engineering
• Abstract:
  In this study, an attempt was made to determine the effect of prolonged heating on the bond strength between ; aggregate and asphalt that contained anti-strip additives (LOF 6500 and Morelife 2200). On account of the ; substantial decrease of anti-strip additive contents for both asphalt binders and mixes when subjected to prolonged ; heating, whether the loss of additive content due to storage and transport at elevated temperatures affects mix ; performance in terms of moisture sensitivity or not, was evaluated in this study. A series of tests, namely Tensile ; Strength Ratio Test (TSR), Contact Angle test, Pneumatic Adhesion test and Atomic Force Microscopy (AFM) test ; were performed, and the results obtained from each of these tests were compared to come to a reliable conclusion ; regarding effectiveness of the various tests for assessing the effect of prolonged heating on the adhesive bond ; strength. Results obtained from the Tensile Strength Ratio test clearly show that as the prolonged heating duration ; increased the TSR values failed the limiting value of 85% as followed by NCDOT specification in as little as six ; hours and continued to further decrease with heating duration. ; Tests were also conducted on asphalt cement containing LOF 6500 antistrip additive using the contact angle ; goniometer, PATTI device and atomic force microscopy (AFM). The results obtained in this study were ; inconclusive for the above mentioned three devices.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18682/dot_18682_DS1.pdf
• File Type:
  [PDF - 4.91 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:9f60ae5c64a6c9076c95e0bd2f2e2742d6e09ddd7181cc9b4fbf4622c195856aedc8a79edeafd2742d1f994a72b9356b58170f16c6726877e471c8c0841cfb97