THE EFFECT OF WATER CONTENT UPON CONSISTENCY

TESTS HAVE SHOWN THAT THE RELATIONSHIP BETWEEN A CHANGE IN THE WATER CONTENT AND THE VARIATION IN CONSISTENCY CAN BE SATISFACTORILY DESCRIBED BY CERTAIN POWER FUNCTIONS. THIS APPROXIMATION, WHICH PROVIDES A SIMPLE MEANS OF PREDICTING THE WATER REQUIREMENT OF MORTAR & CONCRETE, IS CALLED THE K METHOD. IT IS BASED ON THE FOLLOWING INDEPENDENCE HYPOTHESIS. THE MAGNITUDE OF A CHANGE IN CONSISTENCY BROUGHT ABOUT BY A (RELATIVE) CHANGE IN THE WATER CONTENT DOES NOT DEPEND UPON THE COMPOSITON OF THE MIX (TYPE OF CEMENT, CEMENT CONTENT, GRANULOMETRIC COMPOSITION AND MAXIMUM PARTICLE SIZE OF THE AGGREGATES). FOR PREDICTING THE WATER REQUIREMENT THE DILUTION FACTOR K IS EMPLOYED. TO START WITH, K IS INDICATED IN THE FORM OF A POWER FUNCTION FOR VARIOUS METHODS OF CONSISTENCY MEASUREMENT, THEN FURTHER FORMULAE FOR K ARE DEVELOPED. WITH THE AID OF VARIOUS EXAMPLES IT IS SHOWN THAT THE K METHOD IS SIMPLE TO USE AND THAT THE VALUES CALCULATED IN ADVANCE ARE VERY LARGELY IN AGREEMENT WITH THE TEST RESULTS. TABLES AND NOMOGRAMS OF THE K VALUES ARE AVAILABLE FOR PRACTICAL APPLICATION. THEY EACH REFER TO DIFFERENT STANDARD TESTS, SUCH AS THE VICAT PENETRATION TEST FOR CEMENT PASTES, THE FLOW TEST FOR MORTAR ACCORDING TO DIN 1164, AND THE PENETRATION TEST FOR CONCRETE ACCORDING TO DIN 1048. /AUTHOR/

  • Supplemental Notes:
    • Vol 32, No 12, PP 684-692, 11 FIG, 2 TAB, 21 REF
  • Authors:
    • Popovics, S
  • Publication Date: 1966-12

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  • Accession Number: 00212565
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 19 1994 12:00AM