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research article

Delayed ettringite formation

Taylor, H. F. W.
•
Famy, C.
•
Scrivener, K. L.  
2001
Cement and Concrete Research

Delayed ettringite formation (DEF) can damage concrete that has experienced a temperature above about 70°C. Claims that slow release of sulfate from the clinker can have a similar effect in concrete not thus heated are unsupported. Chemical and microstructural aspects of DEF are reviewed. Expansion results from formation of ettringite crystals of submicrometre size in the paste, the larger crystals readily observed in cracks and voids being recrystallisation products. The rate and ultimate extent of expansion are influenced by factors of three types: chemistry, which determines how much ettringite can be formed; paste microstructure, which determines the stresses produced by its formation; and concrete or mortar microstructure, which determines the response of the material to those stresses. Alkali present before the end of the heat treatment can increase expansion, but when present subsequently, it decreases expansion by inhibiting ettringite formation. Leaching therefore promotes expansion. © 2001 Elsevier Science Ltd.

  • Details
  • Metrics
Type
research article
DOI
10.1016/S0008-8846(01)00466-5
Scopus ID

2-s2.0-0035330966

Author(s)
Taylor, H. F. W.
Famy, C.
Scrivener, K. L.  
Date Issued

2001

Publisher

Pergamon-Elsevier Science Ltd

Published in
Cement and Concrete Research
Volume

31

Issue

5

Start page

683

End page

693

Note

Cited By (since 1996): 78

Export Date: 1 June 2011

Source: Scopus

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMC  
Available on Infoscience
June 6, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/68308
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