AN INVESTIGATION OF THE BRITTLE-PLASTIC BEHAVIOR OF ASPHALT MIXTURES BY USE OF AN IMPACT DEVICE

FOUR DIFFERENT TYPES OF ASPHALT, FIVE ASPHALT CONTENTS, AND AN ENVIRONMENTAL TEMPERATURE RANGE FROM -10 F TO 140 F ARE THE VARIABLES CONSIDERED IN THIS STUDY. THE INVESTIGATION WAS BASED ON A FIXED VARIABLE STATISTICAL DESIGN. THE ACCOMPANYING ANALYSIS OF VARIANCE AND MULTIPLE REGRESSION ANALYSIS WAS PERFORMED ON A 7040 IBM COMPUTER. A SURVEY OF THE LITERATURE SHOWED THAT INFORMATION WAS NEEDED ON THE EFFECT OF TEMPERATURE VARIATION WITH ENERGY ABSORPTION. IT WAS DETERMINED THAT THE CHANGE IN GRADATION HAD LITTLE OR NO EFFECT ON THE ENERGY ABSORBED VALUES. THE ENERGY IS ABSORBED PRIMARILY BY THE ASPHALT. THE ASPHALT SPECIMENS ARE SUSCEPTIBLE TO CHANGES IN VELOCITY. FOR THE ASPHALT MIXTURES TESTED, THERE IS A DEFINITE TEMPERATURE TRANSITION RANGE FROM VISCOUS-PLASTIC BEHAVIOR TO BRITTLE BEHAVIOR. AND THIS TRANSITION RANGE SHIFTS AS A FUNCTION OF VISCOSITY, TOWARD THE LOWER TEMPERATURE, AS THE PENETRATION OF THE PARTICULAR ASPHALT TYPE INCREASES. IN THE BRITTLE TEMPERATURE REGION, THE ENERGY ABSORBED VALUES FOR THE THREE PAVING GRADES ARE ESSENTIALLY CONSTANT UP TO THEIR RESPECTIVE TRANSITION TEMPERATURE REGIONS. ASPHALT CONTENT HAS LITTLE EFFECT ON THE ENERGY ABSORBED VALUES IN THE BRITTLE TEMPERATURE REGION, WHILE IT HAS A PRONOUNCED EFFECT IN THE TRANSITION REGION AND PART OF THE PLASTIC TEMPERATURE REGION. FOR THE TEN PERCENT ASPHALT CONTENT MIXES THE MAXIMUM ENERGY ABSORPTION VALUES VARIED OVER A RANGE OF LESS THAN TWENTY PERCENT WITH THE GREATER PENETRATION ASPHALTS HAVING THE LARGER VALUES. AT THE SIX PERCENT ASPHALT CONTENT, THE MAXIMUM ENERGY ABSORPTION VALUES VARIED OVER A RANGE OF LESS THAN TEN PERCENT, WITH THE SINGLE EXCEPTION OF THE 180-200 PENETRATION SPECIMENS WHICH WERE LOWER BY TWENTY PERCENT.

  • Supplemental Notes:
    • Rept No Ce 67-12, VII + 117 PP, 29 FIG, 3 TAB, 29 REF, 2 APP
  • Corporate Authors:

    University of Connecticut, Storrs

    Department of Civil and Environmental Engineering, 261 Glenbrook Road
    Storrs, CT  USA  06269-2037
  • Authors:
    • Gromko, G J
  • Publication Date: 1967-8-10

Subject/Index Terms

Filing Info

  • Accession Number: 00210700
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 17 1994 12:00AM