PHOTO-ELASTIC ANALYSIS OF SHRINKAGE MICROCRACKING IN CONCRETE

A TWO-DIMENSIONAL MODEL WAS DEVISED FOR THE PHOTO- ELASTIC STUDY OF THE STRESS DISTRIBUTION IN CONCRETE DURING THE VARIATIONS IN VOLUME DUE TO EARLY HYDRATION OF THE CEMENT PASTE. THE MODEL COMPRISED A SQUARE ARRAY OF CIRCULAR INCLUSIONS MADE OF PURE EPOXY POLYMER EMBEDDED IN A MATRIX OF PLASTICIZED EPOXY RESIN. SHRINKAGE STRESSES DEVELOPED DURING CURING OF THE MATRIX. THE RATIO OF THE ELASTIC MODULI OF INCLUSIONS AND MATRIX APPROXIMATED TO THAT FOR AGGREGATE AND HARDENED CEMENT PASTE IN CONCRETE. IT WAS SHOWN THAT TENSILE STRESSES, DEVELOPING AT THE AGGREGATE/ CEMENT PASTE INTERFACE CAUSE MICROCRACKS AT THE INTERFACE DURING THE CURING PERIOD OF THE CONCRETE, AND BEFORE ANY APPLICATION OF LOAD. THE EFFECT OF THE DIAMETER/SPACING RATIO OF AGGREGATES WAS STUDIED. /AUTHOR/

  • Availability:
  • Supplemental Notes:
    • Vol 21, No 66, PP 15-22
  • Authors:
    • Theocaris, P S
    • Koufopoulos, T
  • Publication Date: 1969

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Filing Info

  • Accession Number: 00213660
  • Record Type: Publication
  • Source Agency: Building Science Abstracts /UK
  • Files: TRIS
  • Created Date: Jul 6 1970 12:00AM