THE EFFECT OF MIXING TEMPERATURE AND STOCKPILE MOISTURE ON ASPHALT MIXTURES

This report summarizes the effects of various mixing temperatures and stockpile moisture contents on asphalt mixtures produced by conventional and drum mix plants. Asphalt mixtures were produced and placed on the road with water contents ranging from zero to saturated and at temperatures ranging from 175 degree F to 325 degree F at three different sites with different absorptive aggregates. Laboratory specimens as well as field specimens were made in order to evalaute various engineering properties. While some variation in tensile strength, tensile strength ratio, and boiling test results was observed, no significant difference was identified between mixtures produced in the batch plant and the drum plant for all conditions of stockpile moisture and mixing temperature. Both types of asphalt plants were about to remove most or all of the moisture from the stockpile aggregate though they were penalized with higher fuel costs and lower production. Several uncontrolled variables encountered during the experiments (moisture content of asphalt mixture, voids in the material aggregate, air voids, asphalt content and asphalt penetration) caused some variability in the results; however, they did not mask the effects of the controlled variables completely. (Author)

• Record URL:
  • https://library.ctr.utexas.edu/digitized/texasarchive/phase2/358-1-CTR.pdf
• 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
  • Huber, G A
• Publication Date: 1984-8

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 140 p.

Subject/Index Terms

• TRT Terms: Air voids; Asphalt; Asphalt content; Asphalt mixtures; Asphalt plants; Drum containers; Mineral aggregates; Mixers; Mixing plants; Moisture content; Pavement surface course; Penetrants; Stockpiling; Temperature; Tensile strength; Variables
• Old TRIS Terms: Air voids content; Asphalt penetration surface
• Subject Areas: Construction; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00450913
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-85/49+358-1, Res Rpt. 358-1
• Contract Numbers: Res Study 3-9-83-358
• Files: TRIS, USDOT, STATEDOT
• Created Date: Aug 27 2004 9:04PM