ECONOMICS AFFECTING THE HOMOGENEITY OF READY MIXED CONCRETE

THE DATA FROM OVER 200 BATCHES OF CONCRETE REPRESENTING VARIOUS COMBINATIONS OF BATCHING PROCEDURE, MIXING SPEED, AMOUNT OF MIXING AND SIZE OF BATCH, AND INVOLVING THE USE OF FOUR DIFFERENT TYPICAL TRUCK MIERS, SHOW THE FOLLOWING RESULTS: (1) THE MOST IMPORTANT FACTOR IN PRODUCING HOMOGENEOUS CONCRETE IS THE BATCHING PROCEDURE, (2) WITHIN BATCH UNIFORMITY IMPROVED AS THE NUMBER OF REVOLUTIONS AT MIXING SPEED WAS INCREASED, (3) SIZE OF BATCH IN RELATION TO RATED MIXER CAPACITY HAD LITTLE ON WITHIN-BATCH UNIFORMITY FOR THE CONDITIONS INVESTIGATED, AND (4) DIFFERENCES IN PERFORMANCE OF THE MIXERS WAS LESS IMPORTANT THAN THE OTHER VARIABLES STUDIED. WITHIN-BATCH RANGES OF CONCRETE PROPERTIES WERE CORRELATED WITH ONE ANOTHER ABOUT AS WOULD BE EXPECTED. IN VIEW OF THE LARGE NUMBER OF FACTORS SIGNIFICANTLY AFFECTING WITHIN-BATCH UNIFORMITY, CONSIDERATION MIGHT BE GIVEN TO MAKING THE LIMITS ON AMOUNT OF MIXING, RATE OF MIXER ROTATION, AND PERHAPS EVEN SIZE OF BATCH MORE FLEXIBLE. /AUTHOR/

  • Supplemental Notes:
    • Rpt 1, PhasE 1, 25 PP
  • Corporate Authors:

    Nat Ready Mixed Concrete Association

    ,    
  • Authors:
    • Barbosa, R C
  • Publication Date: 1970-6

Subject/Index Terms

Filing Info

  • Accession Number: 00213818
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 19 1970 12:00AM