Identification of laboratory techniques to optimize Superpave HMA surface friction characteristics : final report, April 2010.

Details

• Creators:
  Kowalski, Karol J. ; McDaniel, Rebecca S. ; Olek, Jan
• Corporate Creators:
  Purdue University. North Central Superpave Center
• Corporate Contributors:
  Iowa. Highway Research Board ; Indiana Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Superpave
  • Surface course (Pavements)
  • Friction
  • Laboratory tests
  • Microtexture
  • Macrotexture
  • Literature reviews
  • Testing equipment
  • Asphalt mixtures
  • Pavements, Asphalt concrete--Indiana--Design and construction
  More +
• Publication/ Report Number:
  IHRB TR-450
• Resource Type:
  Tech Report
• Geographical Coverage:
  Iowa
• Edition:
  Final
• Corporate Publisher:
  Iowa. Dept. of Transportation
• Abstract:
  Wet pavement friction is known to be one of the most important roadway safety parameters. In this ; research, frictional properties of flexible (asphalt) pavements were investigated. ; As a part of this study, a laboratory device to polish asphalt specimens was refined and a procedure to ; evaluate mixture frictional properties was proposed. Following this procedure, 46 different Superpave ; mixtures, one stone matrix asphalt (SMA) mixture and one porous friction course (PFC) mixture were tested. ; In addition, 23 different asphalt and two concrete field sections were also tested for friction and noise. ; The results of both field and laboratory measurements were used to develop an International Friction Index ; (IFI)-based protocol for measurement of the frictional characteristics of asphalt pavements for laboratory ; friction measurements. ; Based on the results of the study, it appears the content of high friction aggregate should be 20% or more of ; the total aggregate blend when used with other, polish susceptible coarse aggregates; the frictional properties ; increased substantially as the friction aggregate content increased above 20%. Both steel slag and quartzite ; were found to improve the frictional properties of the blend, though steel slag had a lower polishing rate. In ; general, mixes containing soft limestone demonstrated lower friction values than comparable mixes with hard ; limestone or dolomite. ; Larger nominal maximum aggregate size mixes had better overall frictional performance than smaller ; sized mixes. In addition, mixes with higher fineness moduli generally had higher macrotexture and friction.
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• Format:
  PDF
• Funding:
  TR-450
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/17923/dot_17923_DS1.pdf
• File Type:
  [PDF - 6.10 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:7735b4ecea3e5e39f852ced564f1dc524630ce1c1f43c58a04eed831f8998e94