A FIELD EVALUATION OF TECHNIQUES FOR TREATING ASPHALT MIXTURES WITH LIME. INTERIM REPORT

This report summarizes a field study to evaluate methods of treating asphalt mixtures with both dry hydrated lime and hydrated lime slurry to reduce or alleviate moisture damage. Both batch and drum plants were used to produce the treated and untreated field mixtures. In addition to plant produced mixtures, laboratory mixtures were prepared using methods which simulated the field procedures. Cores were taken from the roadway approximately six months after construction, but the results are not contained in this report. Both dry lime and lime slurry produced beneficial effects and improved moisture resistance of laboratory and field mixtures as measured by the Texas boiling test, Texas freeze-thaw pedestal test, and the wet-dry indirect tensile test. Nevertheless, it appeared tht lime slurry produced slightly improved moisture resistance. The only technique which was questionable involved introducing dry lime into the drum mix plant. Under the conditions of this study it appeared that a great deal of the lime was lost prior to mixing with asphalt. In laboratory prepared mixtures, it was also noted that washing the aggregate prior to use appeared to reduce the moisture resistance of the resulting asphalt mixture. (Author)

• Record URL:
  • https://library.ctr.utexas.edu/digitized/texasarchive/phase2/253-6-CTR.pdf
• Supplemental Notes:
  • Study conducted in cooperation with the Federal Highway Administration Research Study Title, "Moisture Effects on Asphalt Mixtures".
• 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
  • Anagnos, J N
• Publication Date: 1984-11

Media Info

• Features: Figures; References; Tables;
• Pagination: 55 p.

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Asphalt plants; Calcium hydroxide; Drum containers; Mixers; Mixing plants; Moisture content; Slurry
• Old TRIS Terms: Resistance; Slurries
• Subject Areas: Construction; Geotechnology; Highways; Materials; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 00399312
• Record Type: Publication
• Report/Paper Numbers: FHWA-TX-85-47+253-6
• Contract Numbers: Study 3-9-79-253
• Files: TRIS, USDOT, STATEDOT
• Created Date: Feb 28 1987 12:00AM