CALORIMETER-STRAIN APPARATUS FOR STUDY OF FREEZING AND THAWING CONCRETE

INFORMATION AND TECHNIQUES AVAILABLE IN THE PAST HAVE NOT BEEN SUFFICIENT FOR A COMPLETE EVALUATION OF THE ROLE OF THE VARIOUS FACTORS INFLUENCING THE RESISTANCE OF CONCRETE TO FREEZING AND THAWING. IT HAS LONG BEEN RECOGNIZED THAT THE DESTRUCTION OF CONCRETE EXPOSED TO FREEZING AND THAWING IS DUE PRINCIPALLY TO THE FREEZING OF WATER WITHIN THE CONCRETE BECAUSE CONCRETE IN A DRY STATE CONCRETE WILL NOT BE DAMAGED BY FREEZING. WATER-SATURATED NON-AIR-ENTRAINED CONCRETE OF NORMAL WATER-CEMENT RATIO CANNOT RESIST THE DISRUPTIVE FORCES GENERATED BY THE FREEZING OF THE WATER. AIR ENTRAINMENT PROVIDES A PRACTICAL AND FUNDAMENTAL SOLUTION TO THIS FREEZING PROBLEM. FROST RESISTANCE IS CONTROLLED BY THE FREEZABLE WATER CONTENT, AIR VOID CHARACTERISTICS, PASTE PERMEABILITY, AGGREGATE CHARACTERISTICS, AND OTHER FACTORS, NONE OF WHICH ARE READILY EVALUATED EXPERIMENTALLY. THE DEVELOPMENT AND OPERATION OF AN APPARATUS IS DESCRIBED FOR DETERMINING (1) THE AMOUNT OF WATER ACTUALLY FREEZING WITHIN A CONCRETE SPECIMEN AS A FUNCTION OF TEMPERATURE AND TIME, AND (2) THE PHYSICAL RESPONSE OF THE SPECIMEN IN TERMS OF LENGTH CHANGE AS THIS WATER IS FROZEN. EXAMPLES OF THE TYPE OF INFORMATION THAT CAN BE OBTAINED ARE PRESENTED AND DISCUSSED. /AUTHOR/

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  • Supplemental Notes:
    • No 176, pp 9-22, 16 FIG, 1 REF Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
  • Authors:
    • Verbeck, George
    • Klieger, Paul
  • Publication Date: 1958

Media Info

  • Media Type: Digital/other
  • Pagination: 14p
  • Monograph Title: Instrumentation for measuring characteristics of concrete
  • Serial:

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Filing Info

  • Accession Number: 00213254
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 23 1994 12:00AM