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Investigations on cement expansion associated with ettringite formation

Authors
Journal
Cement and Concrete Research
0008-8846
Publisher
Elsevier
Publication Date
Volume
29
Issue
5
Identifiers
DOI: 10.1016/s0008-8846(99)00048-4
Keywords
  • Calcium Aluminates
  • Sulfate
  • Ettringite
  • Expansion

Abstract

Abstract The formation of ettringite and the expansion associated with it were studied on pastes made from an Al-bearing compound, gypsum, and tricalcium silicate. There were significant differences in the rate at which ettringite was formed and in the capacity of the formed ettringite to generate expansion. In some systems ettringite formation was not associated with expansion. An uptake of water from the environment seems to be inessential for an expansion to take place, but intensifies its extent.

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