VISCO-ELASTIC PROPERTIES OF BITUMENS BY THE VIBRATING REED METHOD

THE VIBRATING REED METHOD HAS BEEN USED TO DETERMINE THE ELASTIC AND VISCOUS PROPERTIES OF BITUMENS UNDER DYNAMIC CONDITIONS. THE TECHNIQUE EMPLOYED WAS TO DETERMINE THE RESONANCE CURVE OF A COMPOUND REED CONSISTING OF A STEEL BLADE COATED WITH THE BITUMEN UNDER TEST, AND CLAMPED AT ONE END. YOUNG'S MODULUS OF ELASTICITY WAS THEN CALCULATED FROM THE RESONANT FREQUENCY, AND THE VISCOSITY FROM THE WIDTH OF THE RESONANCE CURVE AT A PREDETERMINED FRACTIONAL HEIGHT. AT THE RESONANT FREQUENCY IT WAS THEREFORE POSSIBLE TO OBTAIN FROM EACH REED THE ELASTIC MODULUS OF THE BINDER AND ONE VALUE OF AN IMAGINARY COMPONENT. AN ALTERNATIVE METHOD OF DETERMINING THESE MODULUI WAS RECENTLY DEVELOPED IN WHICH THE FORCE AND DISPLACEMENT AS WELL AS THE PHASE ANGLE BETWEEN THEM ARE MEASURED INDEPENDENTLY. THIS METHOD IS EXPLAINED.

  • Supplemental Notes:
    • Annual Rept 1965, SPECIAL REPT PAD 14, PP 18-19
  • Corporate Authors:

    Cncl Scient & Indus Res /S Africa

    /Nat Inst Road Res
    ,   USA 
  • Publication Date: 1966

Subject/Index Terms

Filing Info

  • Accession Number: 00210731
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 28 1970 12:00AM