INITIAL EVALUATION OF THE EFFECT OF SYNTHETIC RUBBER ADDITIVES ON THE THERMORHEOLOGICAL PROPERTIES OF ASPHALT MIXTURES

RESULTS ARE PRESENTED OF THE INITIAL INVESTIGATION OF LINEAR VISCOELASTICITY PROPERTY AND THE OTHER RELATED MECHANICAL PROPERTIES OF 8 DIFFERENT KINDS OF ASPHALT MIXTURES (6.1 PERCENT AND 5.0 PERCENT ASPHALT CONTENT BY WEIGHT, HIGH AND LOW VISCOSITY, WITH AND WITHOUT ADDED RUBBER). AT 70 F THE VISCOSITY SHOWS THE MOST SIGNIFICANT EFFECT WHERE MIXTURES WITH LOW-VISCOSITY ASPHALT (AS MEASURED AT 77 F) YIELD HIGH CREEP COMPLIANCE, LOW ULTIMATE COMPRESSIVE STRENGTH AND LOW ULTIMATE TENSILE STRENGTH. MIXTURES WITH HIGH-ASPHALT CONTENT YIELD MODULUS, HIGH CREEP COMPLIANCE FOR THE HIGH VISCOSITY MIXTURES. AT 20 F, ASPHALT CONTENT AND HIGH VISCOSITY CONTRIBUTE TO THE HIGH ULTIMATE COMPRESSIVE STRENGTH AND HIGH ULTIMATE STRAIN. ALSO, AT 20 F, HIGH VISCOSITY AND VISCOSITY-ASPHALT CONTENT INTERACTION CONTRIBUTE TO THE HIGH CREEP COMPLIANCE. THE FINDING ALSO INDICATE THAT THE ASSUMPTION OF LINEAR VISCOELASTIC BEHAVIOR OF THE ASPHALT MIXTURES IS APPROXIMATELY HELD. RUBBER ADDITIVES DO NOT SHOW SIGNIFICANT EFFECT ON CREEP COMPLIANCES, ULTIMATE COMPRESSIVE STRENGTHS AND STRAINS, AND TENSILE STRENGTHS OF THE ASPHALT MIXTURES AT THE INITIAL PERIOD. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1970/313/313-002.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Mechanical Properties of Bituminous Paving 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:
  • Fitzgerald, J E
  • Lai, James S
• Publication Date: 1970

Media Info

• Media Type: Print
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 18-31
• Monograph Title: Bituminous Materials, Mixes, and Compaction
• Serial:
  • Highway Research Record
  • Issue Number: 313
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Asphalt; Asphalt content; Bituminous mixtures; Compressive strength; Creep; Mechanical properties; Synthetic rubber; Tensile strength; Ultimate strength; Viscoelasticity; Viscosity
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211561
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 26 1970 12:00AM