Improving DMS 9210 requirements for limestone rock asphalt - final report.

Details

• Creators:
  Estakhri, Cindy ; Kassem, Emad ; Arambula, Edith ; Scullion, Tom
• Corporate Creators:
  Texas A&M Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Limestone
  • Asphalt mixtures
  • Specifications
  • Field tests
  • Laboratory tests
  • Workability
  • Acceptance tests
  • Pavement maintenance
  • Patching
  • Cold mix paving mixtures
• Publication/ Report Number:
  FHWA/TX-15/0-6686-2
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Texas A&M Transportation Institute
• Abstract:
  Limestone Rock Asphalt (LRA) mixtures have been produced and placed for several decades using ; specification requirements currently listed under DMS 9210. Several districts have had placement issues ; and premature failures at the beginning of 2010. These issues and failures have been attributed to material ; properties. Requirements for DMS 9210 have not changed for several years and need to be evaluated to ; possibly produce a higher quality material to reduce the occurrence of premature failures and to minimize ; placement issues. The objectives of the study are to (1) evaluate specification requirements of Item 330 and ; DMS 9210, (2) conduct field evaluations and lab testing to determine workability and acceptability as ; stockpile material for use as needed in pavement maintenance, and (3) consider improvements to the ; specification requirements to ensure an acceptable and workable stockpile material for up to 6 months. ; The Hveem stability was determined to be a good indicator of rutting resistance of LRA but it does not ; indicate when a mix is too dry and susceptible to raveling. The Cantabro test was able to identify dry ; mixtures with insufficient flux oil as well as poor quality flux oil. ; A Cantabro loss of 15 percent maximum is being proposed as a new specification test and limit
  More +
• Format:
  PDF
• Funding:
  Project 0-6686
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28768/dot_28768_DS1.pdf
• File Type:
  [PDF - 996.61 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:a378e74bcc2970ed27d6423725d8cafb6b60ca582d36b580bd338dc1cc9ad85acdce8612605716f221eb14ba20e40f214010d92bae27967b7b47d42286fb3b3b