Effect of percentage baghouse fines on the amount and type of anti-stripping agent required to control moisture sensitivity : final report.

Details

• Creators:
  Tayebali, Akhtarhusein A. ; Fischer, W Kevin ; Huang, Y. X. ; Kulkarni, M. B.
• Corporate Creators:
  North Carolina State University. Department of Civil Engineering
• Corporate Contributors:
  North Carolina. Dept. of Transportation. Research and Analysis Group
• Subject/TRT Terms:
  • Aggregate gradation
  • Antistrip additives
  • Asphalt concrete
  • Binders
  • Fatigue (Mechanics)
  • Mixtures
  • Moisture damage
  • Performance
  • Rutting
  • Strength of materials
  More +
• Publication/ Report Number:
  FHWA/NC/2003-04 ; NCDOT Research Project 2002-08
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final report, 7/01/2002-3/31/2003
• Corporate Publisher:
  North Carolina. Dept. of Transportation
• Abstract:
  This study investigated the effect of moisture and amount of baghouse fines on AC mixes. Two ; types of baghouse fines, each with a different gradation, were used in varying concentrations to prepare ; laboratory samples. The binder used was PG64-22 and the anti-strip additive used was LOF 6500. ; TSR (AASHTO T283) test results showed a reduction in retained strength for specimens without ; additive as compared to the specimens containing additive showing the effectiveness of the additive in ; preventing the moisture damage. Mixes with highest amount of baghouse fines showed resistance to ; moisture damage in presence of the anti-strip additive. However, absence of additive reduced the strength ; ratio considerably to the point that these mixes would be unacceptable under current NCDOT criterion. ; The mix performance was evaluated using the SST machine to determine the rutting and fatigue ; characteristics of the mixes. In general, it was observed that moisture conditioning reduced rutting and ; fatigue resistance of the mixes considerably, although, the TSR test result showed that an LOF-6500 antistrip ; dosage of 0.5% was sufficient to reduce moisture damage to the point that the mixes would be ; acceptable under the current NCDOT criterion of 85% retained strength.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/16163/dot_16163_DS1.pdf
• File Type:
  [PDF - 2.69 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:a2b6ec4184f8734da2b4343e3871330aff63be9dcfd0029a6e1ab6c958cf93bf