HOW THE MODULUS OF ELASTICITY OF CONCRETE IS AFFECTED BY CEMENTS DIFFERING IN MINERALOGICAL COMPOSITION AND BY NATURAL AND ARTIFICIAL AGGREGATES

THE INVESTIGATION REPORTED WAS CONCERNED WITH HOW THE MODULUS OF ELASTICITY OF CONCRETE IS AFFECTED BY 14 CEMENTS DIFFERING IN MINERALOGICAL COMPOSITION AND BY A NATURAL AND AN ARTIFICIAL AGGREGATE. CONCRETE TEST BEAMS WERE MADE FROM THESE CEMENTS AND AGGREGATES AND THE DYNAMIC MODULUS OF ELASTICITY WAS DETERMINED BY MEANS OF RESONANCE FREQUENCY MEASUREMENTS. FLEXURAL AND CONPRESSIVE STRENGTH TESTS WERE CONDUCTED. THE CEMENTS WERE TESTED IN ACCORDANCE WITH DIN 1164 AND THE SPECIFIC SURFACED DETERMINED BY THE BLAINE METHOD. THE SPECIFIC GRAVITY WAS DETERMINED. IT WAS CONCLUDED THAT THE DYNAMIC MODULUS OF ELASTICITY OF PORTLAND CEMENT CONCRETE WAS NOT SIGNIFICANTLY AFFECTED BY ANY CLINKER PHASE. THERE WAS NO RELATIONSHIP BETWEEN THE RATE OF HYDRATION, OR STRENGTH DEVELOPMENT, OF PORTLAND CEMENT AND THE MAGNITUDE OF THE DYNAMIC MODULUS OF ELASTICITY OF THE CONCRETE FOR EQUAL FLEXURAL AND COMPRESSIVE STRENGTH. SLOWLY HYDRATING PORTLAND CEMENTS PRODUCED AN APPROXIMATE 8% HIGHER MODULUS OF ELASTICITY THAN RAPIDLY HYDRATING CEMENTS. CONCRETES MADE WITH SLOWER-REACTING SLAG HAD A HIGHER DYNAMIC MODULUS OF ELASTICITY THAN CONCRETE MADE WITH HIGHLY-HYDRAULIC SLAG. THE ORDER OF MAGNITUDE OF THE INCREASE OR DECREASE IN THE DYNAMIC MODULUS OF ELASTICITY DEPENDED ON THE MINERALOGICAL COMPOSITION OF THE CLINKER AND OF THE BLASTFURNACE SLAG USED IN CONJUNCTION WITH IT. IT IS CONCLUDED THAT THE MODULUS OF ELASTICITY OF CONCRETE CAN BE MORE STRONGLY AFFECTED BY VARYING THE AGGREGATE THAN BY USING CEMENTS OF DIFFERENT CHEMICAL AND MINERALOGICAL COMPOSITION.

  • Supplemental Notes:
    • Vol 32, No 10, PP 557-567, 17 FIG, 93 REF
  • Authors:
    • Harig, S
  • Publication Date: 1966-10

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  • Accession Number: 00212564
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 22 1994 12:00AM