PARTIALLY COMPACTED WEIGHT OF CONCRETE AS A MEASURE OF WORKABILITY

A STUDY OF THE COMPACTING-FACTOR METHOD OF MEASURING WORKABILITY OF SMALL-AGGREGATE CONCRETE /1 1/2 IN./ INDICATED THAT' /A/ THE DEGREE TO WHICH CONCRETE HEAPS WHEN A MOLD IS ALLOWED TO OVERFILL FROM THE DISCHARGE OF A MIXER REACHES A MAXIMUM AT AN INTERMEDIATE WORKABILITY AND DECREASES AS THE MIXTURE GETS EITHER DRIER OR WETTER, AND /B/ THE NET, LOOSE WEIGHT OF CONCRETE IN A MOLD AFTER STRIKE OFF INCREASES WITH INCREASING WORKABILITY. THE NET, LOOSE WEIGHT OF CONCRETE IN A MOLD FILLED TO OVERFLOWING AND THEN STRUCK OFF COULD FORM THE BASIS FOR CONTROLLING WORKABILITY OF MIXTURES HAVING A SLUMP NOT GREATER THAN 3 IN. STUDIES USING MIXTURES WITH 6-IN. AGGREGATE INDICATED THAT HEAPING WEIGHT, STRUCK-OFF WEIGHT, AND COMPACTING FACTOR INCREASE WITH INCREASED WATER CONTENT UNTIL THE SLUMP REACHES FROM 1 1/2 TO 3 IN. AND THEN THEY DECREASE. ROUTINE DETERMINATIONS OF HEAPING WEIGHT OR STRUCK-OFF LOOSE WEIGHT MIGHT BE USED TO DETECT BATCHES OF EXCESSIVE OR DEFICIENT WATER CONTENT WHICH COULD BE REJECTED BEFORE DELIVERY OF THE FORMS. /RRL/A/

  • Supplemental Notes:
    • Vol 63, No4, PP 441-450, 6FIG, 2TAB
  • Authors:
    • Mather, B
  • Publication Date: 1966-4

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Filing Info

  • Accession Number: 00212231
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Sep 13 1994 12:00AM