VISCOELASTIC ANALYSIS OF SAND-ASPHALT MIXTURES

THEORY OF VISCOELASTICITY IS CONSIDERED AS A PROMISING APPROACH TO THE DEVELOPMENT OF A RATIONAL DESIGN METHOD FOR ASPHALTIC MIXTURES. IN AN ATTEMPT TO EVALUATE THE VISCOELASTIC PROPERTIES OF A SAND-ASPHALT MIXTURE, MECHANICAL RESPONSES WERE STUDIED OVER A WIDE RANGE OF TEMPERATURES USING STATIC CREEP TESTS, STRESS RELAXATION TESTS AND CONSTANT RATE OF STRAIN TESTS. THE DEPENDENCE OF THE VISCOELASTIC FUNCTIONS ON THE PRINCIPAL VARIABLES OF TIME AND TEMPERATURE WAS SEPARATED TO YIELD A FUNCTION OF TIME AND A FUNCTION OF TEMPERATURE. THE TIME FUNCTION IS THE TRANSIENT VISCOELASTIC FUNCTION REDUCED TO AN ARBITRARY AND CONVENIENT REFERENCE TEMPERATURE, WHILE THE TEMPERATURE FUNCTION IS THE TEMPERATURE DEPENDENCE OF THE SHIFT FACTOR. THE RESULTS DEMONSTRATED THAT: (1) FROM THE STRAIN-TIME PLOTS, THE RESPONSE OF SAND-ASPHALT MIXTURES TO THE LOW STRESSES USED (IN COMPARISON TO THE UNCONFINED COMPRESSIVE STRENGTH) CAN BE APPROXIMATED BY THE RESPONSE OF LINEAR VISCOELASTIC MATERIALS TO A VERY SATISFACTORY DEGREE, (2) TIME-TEMPERATURE SUPERPOSITION PRINCIPLES CAN BE APPLIED SATISFACTORILY TO THE CREEP AND THE RELAXATION DATA. THE TEMPERATURE DEPENDENCE OF THE CREEP COMPLIANCE AND OF THE RELAXATION MODULUS CAN BE REDUCED TO AN EQUIVALENT TIME DEPENDENCE YIELDING MASTER CURVES AT EACH TEMPERATURE OVER A VERY WIDE RANGE OF TIME, AND (3) FOR FAILURE CONDITIONS, THE CONCEPT OF FAILURE ENEVLOPE CAN BE APPLIED SUCCESSFULLY, DEMONSTRATING A TIME-TEMPERATURE RELATIONSHIP AT FAILURE. /AUTHOR/

  • Supplemental Notes:
    • Hpr-1/2/, 8, STATE NO R 11-4
  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Civil Engineering, 77 Massachusetts Avenue
    Cambridge, MA  United States  02139

    Massachusetts Department of Public Works

    100 Nashua Street
    Boston, MA  United States  02114

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Moavenzadeh, F
    • Soussou, J
  • Publication Date: 1967-8

Subject/Index Terms

Filing Info

  • Accession Number: 00210382
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Dec 15 1994 12:00AM