EVALUATION OF PULSE VELOCITY TESTS MADE WITH PORTLAND CEMENT ASSOCIATION SONISCOPES

A GENERAL REVIEW OF THE SONISCOPE IS PRESENTED UNDER (1) DEVELOPMENT OF INSTRUMENTATION, (2) USE, (3) FACTORS AFFECTING THE VALUE OF PULSE VELOCITY SUCH AS TIME OF MOIST CURING, FINE AND COARSE AGGREGATES, RELATIVE MIXING WATER CONTENT, CEMENT CONTENT, ENTRAINED AIR, ABSORBED MOISTURE IN THE HARDENED CONCRETE, AND DETERIORATION. RESULTS OF TEST PROGRAMS INDICATE THAT (1) THE SONISCOPE IS CAPABLE OF MEASURING THE TRANSIT TIME OF A MECHANICAL PULSE THROUGH CONCRETE WITH A PRECISION OF APPROXIMATELY ONE MICROSECOND, (2) PULSE VELOCITY, THE RATE OF TRAVEL OF MECHANICAL PULSE, IS A MEASURE OF A PROPERTY OF CONCRETE WHICH MAY OFTEN BE ASSOCIATED WITH OTHER PROPERTIES WITH WHICH ENGINEERS ARE FAMILIAR, (3) LABORATORY TESTS SHOW THAT FOR A GIVEN CONCRETE SUBJECTED TO CONTINUOUS MOIST CURING THE CURVE OF PULSE VELOCITY VERSUS AGE IS SIMILAR IN SHAPE TO THE CURVE OF GAIN IN STRENGTH, (4) VARIATIONS IN PULSE VELOCITY IN HARDENED CONCRETE ARE CAUSED BY CHANGES IN AMOUNT OF ABSORBED MOISTURE, AND (5) DETERIORATION IN CONCRETE IS ACCOMPANIED BY A DROP IN PULSE VELOCITY.

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  • Supplemental Notes:
    • No 206, pp 64-69, 5 FIG, 8 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:
    • Oleson, Calvin C
  • Publication Date: 1959

Media Info

  • Monograph Title: Effects of concrete characteristics on the pulse velocity
  • Serial:

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Filing Info

  • Accession Number: 00213242
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 12 1994 12:00AM