SIZE AND STRENGTH RELATIONSHIPS OF BITUMINOUS CONCRETE FIELD CORES - FINAL REPORT

A QUANTITATIVE EVALUATION IS PRESENTED ON THE EFFECT OF LENGTH-TO-DIAMETER RATIO ON THE ULTIMATE UNCONFINED COMPRESSIVE STRENGTH, THE AXIAL AND TRANSVERSE ELASTIC PROPERTIES, AND THE RHEOLOGICAL CREEP AND DYNAMIC STRENGTH CHARACTERISTICS OF LABORATORY COMPACTED ASPHALTIC CONCRETE TEST SPECIMENS AND FIELD CORE TEST SAMPLES. THE EXPERIMENTAL PHASES INVOLVED THE PREPARATION AND TESTING OF THREE ASPHALTIC CONCRETE MIXES PREPARED IN THE LABORATORY BY GYRATORY COMPACTION AND FIELD CORE TEST SPECIMENS OBTAINED FROM U.S. ROUTE 42 NEAR DELAWARE, OHIO. IN THE THREE LABORATORY MIXES, TWO AGGREGATE TYPES AND TWO ASPHALT PENETRATION GRADES WERE INVESTIGATED. ONE AGGREGATE GRADATION WHICH MEETS OHIO SPECIFICATIONS WAS EMPLOYED FOR ALL LABORATORY MIXTURES. EXPERIMENTAL TEMPERATURES OF 41 DEGREES, 77 DEGREES AND 104 DEGREES F AND FIVE L/D RATIOS RANGING FROM 0.25 TO 2.00 WERE UTILIZED IN THE COMPRESSIVE STRENGTH, RHEOLOGICAL CREEP EXPERIMENTS, AND DYNAMIC TESTING PROGRAM. A DIAMETER EQUAL TO FOUR INCHES WAS USED FOR ALL THE TEST CYLINDERS PREPARED BY THE GYRATORY METHOD OF LABORATORY COMPACTION. FIELD CORE TEST SPECIMENS WERE OBTAINED FOR COMPARISON WHICH HAVE A COMPARABLE LIMESTONE AGGREGATE AND PENETRATION GRADE OF ASPHALT AS ONE OF THE LABORATORY MIXES. THE FIELD AND LABORATORY COMPACTED TEST SPECIMEN DATA HAVE INDICATED THAT THE APPLICATION OF THE LINEAR VISCOELASTIC THEORY AND MECHANISTIC MODELS TO ASPHALTIC CONCRETE ARE VALID, AS WELL AS THAT THE TIME- TEMPERATURE SUPERPOSITION CONCEPT AND THE ANALOGOUS TIME-L/D RATIO EQUIVALENCY PRINCIPLE ARE VALID FOR THE RESEARCH DATA OBTAINED ON THE PHENOMENOLOGICAL LEVEL. LONG-TERM CREEP EXPERIMENTS UP TO FORTY HOURS HAVE PROVIDED AN ADDITIONAL AND INDEPENDENT CHECK OF THE CONCEPTS DEVELOPED AND EMPLOYED IN THIS RESEARCH. A SIGNIFICANT DIFFERENCE IN THE MECHANICAL PROPERTIES OF COMPARABLE LABORATORY AND FIELD COMPACTED TEST SAMPLES WAS NOTED FOR ALL THE STRENGTH PARAMETERS INVESTIGATED. /AUTHOR/

  • Supplemental Notes:
    • Hpr 1(2), BPR NO 29, STATE - EES 258-2
  • Corporate Authors:

    Ohio State University, Columbus

    190 North Oval Drive
    Columbus, OH  United States  43210

    Ohio Department of Highways

    Columbus, OH  United States  43210

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Pagen, C A
  • Publication Date: 1968-9

Subject/Index Terms

Filing Info

  • Accession Number: 00210407
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Nov 20 1994 12:00AM