In 1987 the Federal Highway Administration (FHWA) completed a field study to compare the performance of sulfur-extended asphalt (SEA) pavements to conventional asphalt control (AC) pavements. A representative set of pavements was chosen to provide a comprehensive evaluation of the effects of sulfur on pavement performance. The primary conclusion was that there was no difference in overall performance between the SEA and AC sections. The field study is documented in FHWA Report DP54-01, FHWA, Washington, D.C., 1987. It is entitled "Performance Evaluation of Sulfur-Extended Asphalt Pavements - Field Survey and Assessment." The laboratory study documented in this current study complements the field study. Cores were obtained from many of the pavements and tested (1) to verify that the SEA and AC sections were similar in thickness and mixture composition, except for sulfur content, (2) to predict whether the pavement performances of the SEA and AC sections will remain similar, and (3) to investigate individual pavements where the performances of the two sections were not equal. In general, the laboratory test results supported the results of the field study. Overall, sulfur did not increase or decrease most test properties, and often it had no effect on a given test property of a mixture. Sulfur did decrease the resistance to moisture susceptibility in the laboratory. There were also minor trends indicating that with some mixtures, sulfur may reduce the susceptibility to rutting and increase the susceptibility to fatigue cracking. This report also presents the results of several tasks where SEA binders and mixtures prepared in the laboratory were evaluated.

  • Supplemental Notes:
    • Laboratory support for this work was given by D.A. Grachen of the FHWA Pavements Division, HNR-20, and S.M. Parobeck and F.G. Davis, Jr., of Pandalai Coating Company, which provides on-site laboratory support for the FHWA.
  • Corporate Authors:

    Federal Highway Administration

    Turner-Fairbank Highway Research Center, 6300 Georgetown Pike
    McLean, VA  United States  22101
  • Authors:
    • Stuart, K D
  • Publication Date: 1990-11

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 191 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00608601
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-90-110, NCP 2E1f1012
  • Files: TRIS, USDOT
  • Created Date: May 31 2000 12:00AM