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

Language

English

Media Info

Media Type: Print
Features: Figures; References; Tables;
Pagination: pp 2138--2143
Serial:
- Cement and Concrete Research
- Volume: 36
- Issue Number: 12
- Publisher: Elsevier
- ISSN: 0008-8846
- Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

TRT Terms: Concrete structures; Durability; Ettringite; Expansion; Optimization; Structural deterioration and defects; Structural members; Swelling; Wetting and drying tests
Uncontrolled Terms: Sulfate attack
Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

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