AGGREGATE STRESSES IN CONCRETE

CONCRETE IS REGARDED AS A TWO-PHASE MATERIAL CONSISTING OF CEMENT MORTAR AND AGGREGATES. THE STRESS-STRAIN SITUATION IN AND AROUND PARTICLES OF COARSE AGGREGATE WAS INVESTIGATED EXPERIMENTALLY, FIRST, ON CONCRETE TEST SPECIMENS PROVIDED WITH EMBEDDED AGGREGATE STRESS GAUGES, AND SECOND, ON A SMALLER SCALE, IN PHOTO-ELASTIC MODEL TESTS DEALING WITH SHRINKAGE STRESSES. THE X-RAY PHOTOGRAPHS TAKEN DURING THIS INVESTIGATION HAVE REVEALED THE DISCONTINUITY CONDITIONS IN THE CONCRETE TEST SPECIMENS, AND IT WAS DEMONSTRATED THAT THE EXTENT OF THE DISCONTINUITIES, I.E., THOSE DEFECTS AT THE INTERFACE BETWEEN THE CEMENT MORTAR AND THE COARSE AGGREGATE PARTICLES THAT DEVELOPED DURING OR IMMEDIATELY AFTER CASTING, PRODUCED SUBSTANTIAL EFFECTS ON THE STRENGTH AND THE RHEOLOGICAL PROPERTIES OF THE CONCRETE. /AUTHOR/

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Filing Info

  • Accession Number: 00214069
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 20 1972 12:00AM