CURING EFFECTS OF EXPANSION AND MECHANICAL BEHAVIOR OF EXPANSIVE CEMENT CONCRETE

THE RESULTS OBTAINED IN TWO INVESTIGATIONS ON UNIAXIALLY RESTRAINED PRISMATIC EXPANSIVE CEMENT CONCRETE SPECIMENS ARE REPORTED. THE OBJECT WAS TO FIND OUT HOW THE EXPANSION AND MECHANICAL BEHAVIOR OF EXPANSIVE CONCRETE ARE AFFECTED BY CURING AGE AND BY DELAY IN WATER CURING. THE MECHANICAL CHARACTERISTICS OF EXPANSIVE CEMENT CONCRETE APPEAR TO BE AFFECTED BY THE CURING AGE IN A MANNER DIFFERENT FROM THAT EXPERIENCED WITH CONVENTIONAL CONCRETE. RESULTS SHOW THAT THERE IS A CONSIDERABLE DROP IN STRENGTH AND STIFFNESS AFTER A CERTAIN AGE. THE MAIN REASON FOR THIS DROP APPEARS TO BE THE LARGE TRANSVERSE EXPANSION THAT OCCURS AFTER 12 DAYS. RESULTS ALSO INDICATE THAT THE INITIAL POWER OF EXPANSION OF THE CONCRETE MIX USED IS CONSIDERABLY AFFECTED BY THE AGE OF THE EXPANSIVE COMPONENT. HISTORIES OF LONGITUDINAL AND TRANSVERSE EXPANSION DURING CURING, AS WELL AS STRESS-STRAIN RELATIONSHIP OF CONCRETE DURING COMPRESSIVE TESTS, INDICATE THAT BY DELAYING WATER CURING LONGITUDINAL AND TRANSVERSE EXPANSION STOPS BY 24 HR, LOSS IN FINAL LONGITUDINAL AND TRANSVERSE EXPANSION IS SMALL, AND COMPRESSIVE STRENGTH IS NOT AFFECTED, BUT STIFFNESS IS REDUCED. /AUTHOR/

  • Supplemental Notes:
    • Vol 64, No 2, PP 84-96
  • Authors:
    • Bertero, V V
  • Publication Date: 1967-2

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  • Accession Number: 00212369
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 27 1994 12:00AM