TEXAS BOILING TEST FOR EVALUATING MOISTURE SUSCEPTIBILITY OF ASPHALT MIXTURES. INTERIM REPORT

This report contains a description of the development and use of the Texas Boiling Test to evaluate stripping of materials susceptible to moisture damage. Included is a review and comparison of boiling tests currently in use by several agencies and a recommended tentative test procedure. Preliminary testing indicated that three factors related to testing were important. These factors were the number of times the aggregate and asphalt were heated and mixed before testing, the initial temperature to which the aggregate was heated prior to mixing, and the type of water used for boiling. These three factors were investigated to determine the effect of their variation on test results. Tests were performed on eight mixtures of which five had stripped in the field and three had not. Each mixture and its individual aggregate components were tested to determine whether the results could be used to differentiate between stripping and nonstripping mixtures. Based on these tests and other field testing it was tenatively concluded that mixtures that retained less than 70 percent of the asphalt on the aggregate are moisture susceptible and require treatment. Test results indicate that valuable information is provided by the Texas Boiling Test. The test is simple and easy to perform; it can be performed either in the laboratory during mixture design or on the field-mixed materials. In general, the Texas Boiling Test offers good potential for use in detecting moisture susceptible mixtures before they are placed in the field.

• Corporate Authors:

  University of Texas, Austin

  Center for Transportation Research, 3208 Red River Street
  Austin, TX  United States  78705

  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:
  • Kennedy, T W
  • Roberts, F L
  • Anagnos, J N
• Publication Date: 1984-1

Media Info

• Pagination: 35 p.

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt mixtures; Boiling; Loss and damage; Moisture content; Stripping (Pavements); Test procedures
• Uncontrolled Terms: Susceptibility
• Subject Areas: Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00462306
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: FHWA/TX-85/63+253-5, Research Rpt 253-5
• Contract Numbers: Study 3-9-79-253
• Files: TRIS, USDOT, STATEDOT
• Created Date: Feb 28 1987 12:00AM