APPLICATION OF STATISTICAL MECHANICS TO ANALYSIS OF DEGRADATION OF AGGREGATES

THE PROBLEMS ENCOUNTERED IN THE FORMULATION OF A THEORY OF DEGRADATION OF AGGREGATES ARE INDICATED AND A GENERAL EQUATION BASED ON PRINCIPLES OF STATISTICAL MECHANICS IS DEVELOPED. THE EQUATION IS BASED ON THE ASSUMPTION THAT IN A HETEROGENEOUS MASS, SUCH AS AGGREGATE, CRACKS, FLAWS AND PLANES OF WEAKNESS ARE NORMALLY DISTRIBUTED IN EACH FRACTION . THIS EQUATION RELATES THE REDUCTION IN SIZE TO THE ORIGINAL SIZE AND SURFACE ENERGY OF THE AGGREGATE. THE DEVELOPED EQUATION ALSO EXPLAINS THE LIMITATIONS OF EXISTING COMMINUTION HYPOTHESES SUCH AS RITTINGERS, KISKS AND BANDS. THE EXPERIMENTAL RESULTS OBTAINED FROM THE COMPACTION OF ONE-SIZED AND COMBINATIONS OF DIFFERENT SIZES OF AGGREGATE IN A GYRATORY MACHINE SHOW THAT THE KIND OF AGGREGATE, GRADATION, MAXIMUM SIZE, PRESENCE OR ABSENCE OF ASPHALT, AND DEGREE OF COMPACTION DO NOT AFFECT THE PATTERN OF DEGRADATION OF EACH FRACTION. IT IS FOUND THAT THESE VARIABLES WILL ONLY ALTER THE MAGNITUDE OF THE BREAKAGE ENERGY RECEIVED BY EACH FRACTION DURING THE COMPACTION PROCESS. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 112-123
  • Monograph Title: Bituminous concrete mixtures and construction
  • Serial:

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Filing Info

  • Accession Number: 00217430
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Dec 12 1994 12:00AM