FACTORS AFFECTING FREEZING-AND-THAWING RESISTANCE OF CHERT GRAVEL CONCRETE

A THREE-PART INVESTIGATION WAS MADE OF FACTORS AFFECTING THE FREEZING-AND-THAWING RESISTANCE OF CONCRETE CONTAINING CHERT GRAVELS. PRINCIPAL VARIABLES WERE AGGREGATE SOURCE, PARTICLE SIZE, CURING AND MOISTURE CONTENT OF CONCRETE, AND CEMENT FACTOR. TEST RESULTS WERE CONSISTENT WITH ACCEPTED CONCEPTS OF THE MECHANISM BY WHICH CONCRETE IS DAMAGED FROM FREEZING AND THAWING. THE DATA DEMONSTRATED THAT THOSE CONCEPTS HAVE IMPORTANT PRACTICAL SIGNIFICANCE IN SECURING BEST FIELD PERFORMANCE FROM AVAILABLE MATERIALS. THE TESTS SHOWED THAT /1/ REDUCTION IN THE SIZE OF THE CHERT GRAVEL IMPROVED THE RESISTANCE OF CONCRETE TO FREEZING AND THAWING, /2/ PARTIAL DRYING OF THE CONCRETE BEFORE EXPOSURE GREATLY IMPROVED ITS PERFORMANCE, /3/ ONCE PARTIALLY DRIED, THE CONCRETE WAS NOT EASILY RESATURATED TO THE POINT OF VULNERABILITY TO FREEZING DAMAGE, AND /4/ UNDER SOME COMBINATIONS OF SATURATION AND EXPOSURE, INCREASING CEMENT CONTENT REDUCED THE RESISTANCE OF CONCRETE TO FREEZING AND THAWING. /AUTHOR/

Media Info

  • Monograph Title: Freezing and thawing of concrete and use of silicones
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00211947
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 29 1994 12:00AM