Three experimental test roads containing asphalt-rubber interlayers were constructed. Test pavements were designed as statistical experiments such that future performance analysis could be obtained. Preconditioned surveys were conducted prior to rehabilitation to provide documentation for future condition surveys. Samples of asphalt-rubber were obtained during field mixing of asphalt and rubber for laboratory characterization. Samples of asphalt and rubber were obtained for mixing in the laboratory. A comparison was made between laboratory test results of field and laboratory prepared asphalt-rubber. THhree new laboratory tests were used to evaluate asphalt-rubber engineering properties. These included force ductility, double ball softening point, and torque fork viscosity. Results of these laboratory tests indicate engineering properties of field prepared asphalt-rubber can be duplicated by laboratory prepared mixtures. This means future mixtures of asphalt-rubber can be designed in the laboratory prior to construction. Procedures are described which would allow prediction of rubber content from rotational viscosity data. Prediction of rubber content could be possible in the field by highway department personnel responsible for quality assurance.

  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Texas State Department of Highways & Public Transportation

    Transportation Planning Division, P.O. Box 5051
    Austin, TX  United States  78763

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Shuler, S
    • Adams, C
    • Lamborn, M
  • Publication Date: 1985-8

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 282 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00451707
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-85/71+347-1F, Res Rpt. 347-1F
  • Contract Numbers: Study 2-9-83-347
  • Created Date: Aug 27 2004 9:13PM