CORRELATION OF PHYSICAL PROPERTIES WITH CHEMICAL COMPOSITION OF PAVING GRADE ASPHALTS

SAMPLES OF PAVING-GRADE ASPHALTS FROM ELEVEN DIFFERENT PAVING PROJECTS IN THE STATE OF ARKANSAS WERE SUBJECTED TO PHYSICAL AND CHEMICAL INVESTIGATIONS TO DETERMINE THE STRESS RELAXATION MODULI, CHEMICAL COMPOSITION, AND THE MOLECULAR WEIGHT OF THE CHEMICAL FRACTIONS. THE STRESS RELAXATION MODULI WERE DETERMINED BY MEANS OF A ROTATIONAL CONICYLINDRICAL VISCOMETER, THE CHEMICAL COMPOSITIONS WERE DETERMINED BY MEANS OF A CHROMATOGRAPHIC SEPARATION TECHNIQUE, AND THE MOLECULAR WEIGHTS OF THE FRACTIONS WERE DETERMINED BY MEANS OF THE MELTING POINT DEPRESSION OF A PURE SOLVENT METHOD. A STEP-WISE REGRESSION ANALYSIS WAS PERFORMED TO CORRELATE PHYSICAL PROPERTIES SUCH AS VISCOSITY, DUCTILITY, AND PENETRATION WITH THE CHEMICAL PROPERTIES SUCH AS COMPOSITION AND MOLECULAR WEIGHT. AN ATTEMPT WAS MADE TO DETERMINE HOW THE FOREGOING CHEMICAL PROPERTIES VARIED WITH SAMPLE AGE. THE REGRESSION ANALYSIS YIELDED 206 LINEAR EQUATIONS OF WHICH 114 OR 55.3% HAD A MULTIPLE CORRELATION COEFFICIENT OF 75% OR HIGHER. THE AGING STUDIES INDICATED THAT THE CHEMICAL PROPERTIES GENERALLY CHANGED AS THE SAMPLES AGED TO THE DETRIMENT OF DESIRABLE PHYSICAL PROPERTIES. /NTIS/

  • Supplemental Notes:
    • Rept No HRC-21
  • Corporate Authors:

    University of Arkansas, Fayetteville

    Department of Chemical Engineering
    Fayetteville, AR  USA  72701
  • Authors:
    • Mccollum, J R
    • Couper, J R
  • Publication Date: 1972-12

Media Info

  • Pagination: 125 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00210499
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Final Rpt
  • Files: TRIS, USDOT
  • Created Date: Jun 26 1974 12:00AM