Support for the Implementation of a Longitudinal Joint Density Specification for Hot-Mix Asphalt Concrete

Details

• Creators:
  Estakhri, Cindy K.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas Department of Transportation. Research and Technology Implementation Office ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Asphalt Concrete Pavements Contractors Density Hot Mix Asphalt Implementation Longitudinal Construction Joint, Longitudinal Joint Density Longitudinal Joints Road Construction Training
• Publication/ Report Number:
  FHWA/TX-06/5-1757-01-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Texas
• Edition:
  January 2004 – March 2005
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  Research project 0-1757 assessed the density of the longitudinal construction joint of many pavements in Texas and identified that a significant joint density problem existed, which justified the implementation of a joint density specification. This specification is now included as part of the Standard Specifications for Item 341 (Dense-Graded Hot-Mix Asphalt). To facilitate the implementation of the research and specification, the following objectives were included in this implementation project: • identify the most promising construction techniques aimed at achieving longitudinal joint density; • develop and conduct training seminars for the districts on construction of longitudinal joints and on the new TxDOT testing and specification requirements; • acquire non-nuclear density gauges; and • evaluate current longitudinal joint density criteria and the ability of contractors to meet the criteria. Project 0-1757, which provided the background supporting the need for a longitudinal joint density specification, reported densities near the unconfined edge averaging 6 to 7 lb. per cubic foot below the densities taken at the center of the mat. Since the implementation of a joint density specification, a significant improvement in the longitudinal joint density has been observed. Data from some of the projects presented herein indicate a joint density of only 1.0 pcf (or less) below the density of the mat interior.
• Format:
  PDF
• Funding:
  5-1757-01-1
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:3f939c8b594e2b0a29335e15bca5583a7dd78a0894ec8aed54d60e18e79226d700c5fb61ec87c24aaa4c468c319d2b3b348bb96e116188d2c7d357c86dc05e6f
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/86456/dot_86456_DS1.pdf
• File Type:
  [PDF - 71.90 KB ]