Jump to content

Monocalcium aluminate

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by DePiep (talk | contribs) at 02:34, 30 November 2015 (Chembox: rm unused parameters ATC and DrugBank, deprecated in section (+minor edits) (via AWB script)). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Monocalcium aluminate
Names
IUPAC name
Monocalcium aluminate
Identifiers
Properties
CaAl2O4
Molar mass 158.038676 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Monocalcium aluminate (CaAl2O4) is one of the series of calcium aluminates.[1] It does not occur in nature, but is important in the composition of calcium aluminate cements.

Properties

Monocalcium aluminate is formed when the appropriate proportions of calcium carbonate and aluminium oxide are heated together until the mixture melts. It melts incongruently at 1390 °C. The crystal is monoclinic and pseudohexagonal, and has density 2945 kg.m−3. In calcium aluminate cements, it exists as a solid solution in which the amount of minor elements depends upon the bulk composition of the cement. A typical composition[2] is Ca0.93Al1.94Fe0.11Si0.02O4. It reacts rapidly with water, forming the metastable hydrate CaO·Al2O3·10H2O, or a mixture of 2CaO·Al2O3·8H2O, 3CaO·Al2O3·6H2O and Al(OH)3 gel. These reactions form the first stage of strength development in calcium aluminate cements.

References

  1. ^ H F W Taylor, Cement Chemistry, Academic Press, 1990, ISBN 0-12-683900-X, p 35
  2. ^ P. C. Hewlett (Ed)Lea's Chemistry of Cement and Concrete: 4th Ed, Arnold, 1998, ISBN 0-340-56589-6, p715


Stub icon

This inorganic compound–related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Monocalcium_aluminate&oldid=693050509"