Large-Stone Hot Mix Asphalt Pavements

Details

• Creators:
  Price, David A. ; Aschenbrener, Timothy B.
• Corporate Creators:
  Colorado. Department of Transportation
• Corporate Contributors:
  United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Asphalt
  • Rutting
  • Smoothness
  • Stone
  • Aggregate mixtures
  • Aggregate segregation
  • Construction
  • Costs
  • Hot mix asphalt
  • Laboratory tests
  More +
• Publication/ Report Number:
  CDOT-DTD-94-5
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Final Report
• Corporate Publisher:
  Colorado. Department of Transportation
• Description:
  Large-stone hot mix asphalt (HMA) pavements have been promoted by various associations including the National Asphalt Pavement Association (NAPA) as an answer to rutting problems which exist with current pavement design. Until 1988 the Colorado Department of Transportation (CDOT) had little or no experience with the advantages or disadvantages of large-stone HMA pavements. This report investigates problems encountered in the construction of three large-stone HMA construction projects. Problems encountered with large-stone HMA include segregation of the mix and the validity of mix designs produced with standard test equipment. The study examined the following: the lab tests in use by the CDOT for large-stone pavements, constructability, field performance, and cost required to produce the mix. The study found that grading G should be allowed on projects when practical; grading G should be used as a base course; segregation and smoothness should be addressed before paving; if used as a wearing surface, large-stone HMA should be for experimental projects where pavement smoothness and segregation of the mix are addressed extensively before paving; and grading G should be placed in a minimum lift of 75 mm (3 in.).
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93781/dot_93781_DS1.pdf
• File Type:
  [PDF - 3.61 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:002906d8ed0c4ff67863526c15c25d60a09dabb386fe6076ef23138427e1bc6a2248289ef3a26dd4eaaf0cb0dc146616c3e2b39bf551913eb1538b05cd5bb72b