FLOW IN AGGREGATE-BINDER MIXTURES

THE PRIMARY PURPOSE OF THIS STUDY IS TO ATTEMPT TO DEFINE AND DETERMINE QUANTITATIVELY THE MAJOR PARAMETERS AFFECTING BEHAVIOR /FLOW/ OF AGGREGATE-ASPHALT COMPOSITES. THE WORK INVOLVES SEARCH AND DEVELOPMENT OF THEORIES DESCRIBING AGGREGATE PARTICLES, THEIR BEHAVIOR WHEN MIXED WITH ASPHALT AND EXPERIMENTAL LABORATORY WORK TO MEASURE THE CHARACTERISTICS INVOLVED. THIS PROGRESS REPORT DESCRIBES BRIEFLY THE DATA DEVELOPED SO FAR. THREE TYPES OF ROCKS ARE CENTRAL IN THIS PRESENTATION' /1/ CRUSHED LIMESTONE, /2/ ROUND GRAVEL, AND /3/ CRUSHED GRAVEL, WITH MOST PIECES IN THE SIZE RANGE OF 3/4 INCH TO NO. 4 AND SOME EXPERIMENTS WITH SAND SIZES. THE RESULTS TO DATE INCLUDE MEASUREMENTS OF PARTICLE VOLUMES AND SURFACE ROUGHNESS AND THE DEVELOPMENT OF A PARTICLE PACKING EQUATION FOR SIMPLE GRADATIONS. SOME DATA ON ACTUAL AGGREGATE-ASPHALT MIXES IS ALSO INCLUDED. THE MOST IMPORTANT FINDINGS SO FAR ARE'/1/ SURFACE ROUGHNESS APPEARS TO BE THE MOST IMPORTANT AGGREGATE VARIABLE, BECAUSE IT AFFECTS THE PACKING VOLUME FOR EACH PARTICLE. PARTICLE SHAPE AND ANGULARITY APPEAR TO PLAY A MINOR ROLE IN BULK BEHAVIOR. /2/ PARTICLE PACKING VOLUME DISTRIBUTION /INCLUDING SURFACE ROUGHNESS IN THIS VOLUME/ PROMISES MUCH MORE EXACT AND PREDICTABLE GRADING FOR AGGREGATES USED IN MIXES THAN IS CURRENTLY ACHIEVED BY SIZE GRADING. /AUTHOR/

  • Supplemental Notes:
    • Progress RePORT NO 1
  • Corporate Authors:

    Purdue University

    School of Aeronautics and Astronautics
    West Lafayette, IN  United States  47907
  • Authors:
    • Tons, E
  • Publication Date: 1967-2-1

Subject/Index Terms

Filing Info

  • Accession Number: 00210367
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Jun 5 1994 12:00AM