INVESTIGATION OF VIBRATING SLOPE METHOD FOR MEASURING CONCRETE WORKABILITY

A SERIES OF TESTS WERE DESIGNED TO EVALUATE A METHOD OF DETERMINING THE WORKABILITY OF FRESHLY MIXED CONCRETE USING A VIBRATING, SLOPING TROUGH. IN THIS TEST METHOD, A GIVEN WEIGHT OF CONCRETE IS CONSOLIDATED IN A CONTAINER AT THE UPPER END OF THE SLOPING TROUGH OR CHANNEL. THE WALL AT THE LOWER END OF THE CONTAINER IS THEN REMOVED, AND THE WHOLE ASSEMBLY IS VIBRATED. THE TIME REQUIRED FOR HALF OF THE INITIAL WEIGHT OF THE CONCRETE TO FLOW DOWN THE CHANNEL UNDER VIBRATION IS USED AS A MEASURE OF THE WORKABILITY. THE LESS THE TIME REQUIRED FOR THE HALF-WEIGHT TO DEPOSIT ON A SCALE AT THE END OF THE CHANNEL, THE MORE WORKABLE IS THE MIXTURE. TWO SERIES OF TESTS WERE MADE. IN THE FIRST SERIES, TWO MIXTURES WERE PROPORTIONED WITH 6-IN. MAXIMUM SIZE AGGREGATE TO HAVE WIDELY DIFFERENT DEGREES OF WORKABILITY. RESULTS OF TESTS PERFORMED AS PART OF ANOTHER PROGRAM INDICATED THAT VARIATION IN AIR CONTENT, WITH SLUMP AND MORTAR VOLUME CONSTANT, HAS LITTLE EFFECT ON WORKABILITY AS DETERMINED BY THE VIBRATING SLOPE METHOD. /AUTHOR/

  • Supplemental Notes:
    • No 6-849, 17 PP
  • Authors:
    • Saucier, K L
  • Publication Date: 1966-12

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  • Accession Number: 00212346
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 25 1994 12:00AM