EFFECT OF ORGANIC COMPOUNDS ON THE INTERCONVERSIONS OF CALCIUM ALUMINATE HYDRATES: HYDRATION OF TRICALCIUM ALUMINATE.

THE PASTE HYDRATION OF TRICALCIUM ALUMINATE IN THE PRESENCE OF ORGANIC COMPOUNDS WAS INVESTIGATED AT SEVERAL TEMPERATURES UP TO 75 DEGREES C. THE RESULTS CONFIRM EARLIER HYPOTHESES THAT THE HEXAGONAL CALCIUM ALUMINATE HYDRATES (PRINCIPALLY HYDRATED TRICALCIUM ALLUMINATE) WHICH ARE FIRST FORMED CREATE A PROTECTIVE BARRIER AROUND THE REMAINING TRICALCIUM ALUMINATE AND SEVERELY RESTRICT FURTHER HYDRATION. ABOVE 30 DEGREES C, CONVERSION TO HEXAGONAL CALCIUM ALUMINATE HYDRATES BREAKS DOWN THIS BARRIER AND CAUSES RAPID HYDRATION OF TRICALCIUM ALUMINATE. ORGANIC COMPOUNDS RETARD THE HYDRATION OF TRICALCIUM ALUMINATE BY INHIBITING THE CONVERSION REACTION. EXPERIMENTS WITH SYNTHETIC HYDRATED TRICALCIUM ALUMINATE SHOWED THAT ORGANIC MOLECULES CAN FORM INTERLAYER COMPOUNDS, AND IT IS CONSIDERED THAT RANDOM SORPTION INTO THE HYDRATED TRICALCIUM ALUMINATE STRUCTURE RESTRICTS THE TRANSFORMATION TO HEXAGONAL CALCIUM ALUMINATE HYDRATES. OTHER ASPECTS OF TRICALCIUM ALUMINATE HYDRATION AND OF THE REACTVITIY OF HYDRATED TRICALCIUM ALUMINATE ARE ALSO DISCUSSED. /AUTHOR/

  • Supplemental Notes:
    • Vol 53, No 2, PP 65-69, 3 TAB, 23 REF
  • Authors:
    • Young, J F
  • Publication Date: 1970-2

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00213681
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 25 1970 12:00AM