This research project was to evaluate the effect on performance that various additives and, or, compaction had on the performance of the pavement. The following additives were evaluated: Anti-stripping additives, ground scrap rubber, and carbon black. Samples were also evaluated at approximately 0, 3, 10, and 15 percent voids to determine the effect compaction had on the performance of the pavement. The intent was to find an additive or combination of additives and compaction that would significantly improve the quality and serviceable life of the pavements while remaining economically justifiable. The different mix designs were evaluated using the Hveem method. The resilient modulus, effect of water on cohesion of compacted bituminous mixtures, and an accelerated moisture damage test was performed on each design mix. Most of the additives did not show significant, if any, improvement in the laboratory test results. The best improvement in laboratory test result came from the anti-stripping asphalt additive, which is one of the least costly and simplest to include in the pavement mixture. As the void content increases, the test results and field observations indicate increased sensitivity to moisture damage. In the laboratory tests, the specimen with high void content showed a dramatic decrease in the test results. The field observations indicate that pavements with high voids are more susceptible to stripping and ravelling problems. (FHWA)

  • Corporate Authors:

    Colorado Department of Highways

    4201 East Arkansas Avenue
    Denver, CO  United States  80222
  • Authors:
    • Abel, F
    • Proctor, J
  • Publication Date: 1980-2

Media Info

  • Pagination: 65 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00322721
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-CO-RD-80-4 Final Rpt
  • Contract Numbers: 1473
  • Created Date: Mar 12 1981 12:00AM