THE HEAT OF HYDRATION AND ITS DETERMINATION

THE AUTHOR DISCUSSES ALL THE QUESTIONS RELATED TO THE HEAT OF HYDRATION AND POINTS OUT, THAT ITS DETERMINATION COULD BE MADE EITHER WITH ADIABATIC CALORIMETRY OR THE ISOTHERMAL-SOLUTION-CALORIMETRY. COMPARISON OF BOTH METHODS IS GIVEN. IT IS FURTHER SHOWN, THAT THE ADIABATIC CALORIMETRY IS NOT ONLY QUICKER TO CARRY OUT BUT ALSO IT GIVES MORE ACCURATE RESULTS. BY DRAWING UP THE TEMPERATURE-TIME-CURVE IN THE ADIABATIC CALORIMETRY, THE RATE OF EVOLUTION OF HEAT COULD BE OBSERVED AND THUS AN EXACT IDEA OF THE COURSE OF TEMPERATURE COULD BE OBTAINED. THE REPRODUCIBILITY OF THE TEMPERATURE MEASUREMENT IN THIS METHOD IS ABOUT PLUS OR MINUS 0.15C. THEREFORE, THE HEAT OF HYDRATION OF CEMENT COULD BE GIVEN WITH AN EXACTNESS OF PLUS OR MINUS 0.25 TILL 0.60 CAL/G CEMENT, DEPENDING UPON THE RATIO OF MIXING. FURTHERMORE, THE AUTHOR SUGGESTS THAT THE INVESTIGATIONS ON THE QUALITY OF CONCRETE COULD BE CARRIED OUT AT THE BUILDING SITE ITSELF. BY THIS MEANS THE FAVORABLE MIXING PROPORTION OF CONCRETE COULD BE DETERMINED AND BESIDES THIS, THE QUALITY OF THE CONCRETE COULD ALSO BE TESTED. THE SPECIMENS USED FOR THE INVESTIGATIONS IN THE CALORIMETER COULD BE TAKEN OUT AND USED FOR THE DETERMINATION OF COMPRESSIVE STRENGTH OF CYLINDRICAL SPECIMENS. /RRL/A/

  • Supplemental Notes:
    • No 493, 20 PP, 3 FIG, 5 TAB, 1 PHOT, 6 REF
  • Corporate Authors:

    Forschinst Vereins Zementfab /Aust

    ,    
  • Authors:
    • Catharin, P
  • Publication Date: 1967-2

Subject/Index Terms

Filing Info

  • Accession Number: 00212972
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: May 19 1970 12:00AM