Effects of components on the rate of heat liberation of the hydration in the system of glass/gypsum/lime

Seishi Goto, Hirotaka Fujimori, Atsushi Hidaka, Koji Ioku

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Slag-simulated glasses in the system of CaO-Al2O3 -SiO2 were prepared. Their rates of heat liberation were measured in the system with gypsum and lime, especially in the excess gypsum system. They have a period with constant rate of heat liberation. These rates depend on the components of the glass. The effects of the components on the rate of heat liberation were discussed. The rates of constant heat liberation depend on the composition of glass especially the contents of CaO and Al2O3. The period of this process was controlled by the amount of lime addition. During this stage, the solid Ca(OH)2 was completely consumed. In this sulfate-excess system, the reaction equation, during Ca(OH)2 consumption, should be written as; glass + gypsum + lime ⇒ C-S-H with a C/S ratio of 1.42 and Ettringite.

Original languageEnglish
Pages (from-to)771-776
Number of pages6
JournalJournal of the European Ceramic Society
Volume26
Issue number4-5
DOIs
Publication statusPublished - 2006 Jan 11
Externally publishedYes

Keywords

  • CaO-AlO-SiO glass
  • Chemical properties

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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