STUDY ON MIX DESIGN CRITERIA FOR CONTROLLING THE EFFECT OF INCREASED TIRE PRESSURE ON ASPHALT PAVEMENT

As axle loads have increased, the use of higher tire pressures has become more popular in the trucking industry, and radial tires are predominantly used. However, existing mix design procedures may not produce mixtures capable of withstanding higher tire pressures. They also may not identify potentially highly deformable mixtures. To evaluate the mix design process used by Oregon State Highway Division, aggregate from four different sources was used. One percent lime slurry was added to two aggregates. Six different aggregate gradations, including the Fuller maximum density gradation, were tested. In addition to the routine asphalt mix tests, a simple creep test was run for 3 hr at 40 deg C, and a compression stress of 0.1 MPa (14.5 psi) was applied. According to the results of creep tests, it is not always true that a mix with a high Hveem stability value resists deformation better than one with low stability. This indicates that current mix design criteria are probably inadequate for producing mixtures capable of withstanding high tire pressures and for identifying potentially highly deformable mixtures. In general, creep stiffness decreases with increases in the percentage of aggregate passing the No. 200 sieve. The effect of the percentage passing the 1/4-in. or No. 10 sieves on creep stiffness is not clear. The results indicate that adding 1 percent lime slurry improves the resistance of deformation of asphalt mixes.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1988/1171/1171-018.pdf
• Record URL:
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1171, Asphalt Materials and Mixtures.Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Kim, Oh-Kee
  • Bell, Chris A
  • Wilson, James E
  • Boyle, Glenn
• Publication Date: 1988

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 149-159
• Monograph Title: Asphalt materials and mixtures
• Serial:
  • Transportation Research Record
  • Issue Number: 1171
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Aggregate gradation; Asphalt pavements; Asphalt tests; Calcium oxide; Creep tests; Deformation; Inflation; Mix design; Slurry; Tire pressure; Tires
• Uncontrolled Terms: Lime slurry
• Subject Areas: Highways; Materials; Vehicles and Equipment; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00483634
• Record Type: Publication
• ISBN: 0309047102
• Files: TRIS, TRB, ATRI
• Created Date: May 31 1989 12:00AM