Maximizing the use of local materials in HMA surfaces.

Details

• Creators:
  McDaniel, Rebecca S. ; Shah, Ayesha
• Corporate Creators:
  Purdue University. North Central Superpave Center
• Corporate Contributors:
  Purdue University. Joint Transportation Research Program ; Indiana Department of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Blending
  • Mixing
  • Aggregates
  • Aggregate mixtures
  • Friction
  • Polishing (Aggregates)
  • Macrotexture
  • Texture
  • Aggregate blending
  • Friction
  More +
• Publication/ Report Number:
  FHWA/IN/JTRP-2012/07
• Resource Type:
  Tech Report
• Geographical Coverage:
  Indiana
• Edition:
  Final report.
• Corporate Publisher:
  Purdue University. Joint Transportation Research Program
• Abstract:
  One approach to reducing initial construction costs is to maximize the use of locally available aggregates. The main concern with using ; locally available carbonate aggregates, however, is that they tend to polish under traffic and provide inadequate friction. INDOT ; specifications for asphalt surface mixes, especially for high volume traffic, require high friction aggregates like steel slag, blast furnace ; slag or sandstone, which are more resistant to polishing. These premium aggregates are not readily available in all parts of the state, ; requiring long haul distances from limited sources in Indiana or out of state. ; The study summarized here was conducted to investigate the feasibility of using greater quantities of local, less polish resistant ; aggregates, specifically limestones, in asphalt surfaces when blended with high friction aggregates. ; Samples of blends of various quantities of polish‐susceptible aggregates with high friction aggregates were prepared, polished to ; simulate the action of traffic, and tested in the laboratory for their frictional properties. The variables considered include mix type (HMA ; and SMA), coarse aggregate type (two polish‐susceptible aggregates blended with steel furnace slag, blast furnace slag and sandstone), ; polish‐susceptible aggregate content, and amount of limestone fine aggregate (in HMA). ; The results of this study demonstrate that local, polish susceptible aggregates can be used to replace the high quality friction aggregates ; in HMA and SMA surface mixtures without detrimental effect on friction. ; In addition, the laboratory evaluation procedures used in this study could be implemented as a screening test for new materials or new ; types of mixtures. Such a screening test would allow contractors, material suppliers and INDOT to ascertain whether a material warrants ; further investigation before the effort and funds are invested in construction of a field trial.
  More +
• Format:
  PDF
• Funding:
  SPR-3308
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24752/dot_24752_DS1.pdf
• File Type:
  [PDF - 21.94 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:6cacaca997d6660991c82f8456f18143cfde4c8e98855b14096a38a51854a61b