Phase relations in the CaO-SiO2-H2O system to 200°C at saturated steam pressure.

Fredrik Paul Glasser, S. Y. Hong

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Phase relations in the title system were studied using crystalline and amorphous precursors. These were treated in sealed steel alloy autoclaves for periods ranging up to 12 months. Many of the synthetic precursors crystallised to give high purity, single-phase preparations. Although the CaO - SiO2 - H2O system is marked by metastable phase formation, it is demonstrated that a number of reactions important to establish the low-temperature phase relationships can be shown to occur reversibly and therefore define the phase equilibrium. New stability data are presented for hillebrandite, afwillite, xonotlite, tobermorite and jennite. Synthetic jennite is shown to have a Ca/Si atomic ratio similar to 1.45, rather less than the reported 1.5 ratio. A phase diagram revised in light of new knowledge is presented. (C) 2003 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1529-1534
Number of pages5
JournalCement and Concrete Research
Volume34
DOIs
Publication statusPublished - 2004

Keywords

  • system CaO-SiO2-H2O
  • calcium silicate hydrates
  • phase equilibria
  • hydrothermal reactions
  • HYDROTHERMAL REACTIONS
  • CALCIUM HYDROXIDE
  • AMORPHOUS SILICA
  • JENNITE

Cite this

Phase relations in the CaO-SiO2-H2O system to 200°C at saturated steam pressure. / Glasser, Fredrik Paul; Hong, S. Y.

In: Cement and Concrete Research, Vol. 34, 2004, p. 1529-1534.

Research output: Contribution to journalArticle

Glasser, Fredrik Paul ; Hong, S. Y. / Phase relations in the CaO-SiO2-H2O system to 200°C at saturated steam pressure. In: Cement and Concrete Research. 2004 ; Vol. 34. pp. 1529-1534.
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