A Concrete Performance Test for Delayed Ettringite Formation: Part I Optimisation

Delayed ettringite formation (DEF) is a rare internal swelling reaction of concrete that, in a wet environment, may considerably reduce durability of a structure or a member that has been prefabricated in a factory. As a result of a large number of studies, the main causes of this problem have been established and this paper proposes a test method to predict the susceptibility of a concrete to DEF and provide long-term protection against this hazard. After an examination of the feasibility of a test based on wetting and drying cycles, results of an optimization study based on a factorial experimental plan are provided. The test is in 4 stages: concrete manufacture, a heat treatment that simulates steam curing in a factory or the heating that occurs in mass cast in-situ concrete, wetting and drying cycles, and monitoring the longitudinal expansion of specimens immersed in water.

  • Availability:
  • Supplemental Notes:
    • Abstract reprinted with permission from Elsevier
  • Authors:
    • Pavoine, Alexandre
    • Divet, Loic
    • Fenouillet, Stephane
  • Publication Date: 2006-12

Language

  • English

Media Info

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Filing Info

  • Accession Number: 01042245
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 16 2007 6:52PM