MEASUREMENTS OF WATER VAPOR PRESSURE IN HARDENED CONCRETE

A BRIEF ACCOUNT IS GIVEN OF THE VARIOUS STATES IN WHICH WATER CAN BE PRESENT IN HARDENED CONCRETE, AND A SURVEY IS MADE OF THE METHODS WHICH ARE USED IN GENERAL TO MEASURE MOISTURE CONDITIONS IN SOLID SUBSTANCES. THE SUBJECT OF THE PRESENT REPORT IS CONFINED TO THE MEASUREMENT OF THE WATER VAPOUR PRESSURE IN A SMALL CAVITY IN THE INTERIOR OF THE CONCRETE, AND MENTION IS MADE OF SEVERAL METHODS WHICH ARE USED FOR SUCH MEASUREMENTS. THEN FOLLOWS A DETAILED DESCRIPTION OF THE METHOD WHICH WAS EVOLVED FOR THIS PURPOSE AT THE SWEDISH CEMENT AND CONCRETE RESEARCH INSTITUTE, AND WHICH IS BASED ON MEASUREMENTS OF DIELECTRIC CHARACTERISTICS OF A GYPSUM CELL. THIS DESCRIPTION COVERS THE MATERIALS, THE DESIGN, AND THE CONSTRUCTION OF THE MOISTURE GAUGES WHICH ARE EMPLOYED IN THIS METHOD, AS WELL AS THE CALIBRATION, THE SENSITIVITY, AND THE STABILITY (ACCURACY IN MEASUREMENTS) OF THESE GAUGES. AN APPENDIX DEALS WITH A METHOD WHICH HAS BEEN EVOLVED FOR MEASURING THE RATE OF REMOVAL OF WATER FROM THE CONCRETE IN A VACUUM. /AUTHOR/

  • Supplemental Notes:
    • No 35,57 pp
  • Corporate Authors:

    Royal Institute of Technology, Sweden

    Swedish Cement and Concrete Research Institute
    ,   Sweden 
  • Authors:
    • Nielsen, KEC
  • Publication Date: 1967

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Filing Info

  • Accession Number: 00212485
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 8 1994 12:00AM