Français
1. Mechanism of the internal sulfate reaction
The phenomenon of internal sulfate reaction (ISR) results from the delayed formation of a mineral called "ettringite" with the chemical formula 3CaO.Al 2 O 3 .3CaSO 4 .32H 2 O.
This delayed formation of ettringite can lead to expansion, manifested by the appearance of relatively large-mesh, multi-directional cracking on the concrete surface.
However, ettringite is not systematically harmful to concrete, as it is a normal product of cement hydration. That's why we've provided the following information on the different types of ettringite found in concrete.
1.1 Different...
The Ultimate Scientific and Technical Reference
This article is included in
Pathologies and building rehabilitation
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Mechanism of the internal sulfate reaction
Pathology and management of diseased structures
Bibliography
References
Standards and norms
- Cement – Part 1: Composition, specifications and conformity criteria for common cements. - NF EN 197-1 -
- Amendement A1 à la norme NF EN 197-1. - NF EN 197-1/A1 -
- Concrete – Part 1: Specification, performance, production and conformity. - NF EN 206-1 -
- Amendement A1 à la norme NF EN 206-1. - NF EN 206-1/A1 -
- Amendement A2 à la norme NF EN 206-1. - NF EN 206-1/A2 -
- Railway...
Directory
Organizations – Federations – Associations
-
French Civil Engineering Association – AFGC
-
Laboratoire Central des Ponts et Chaussées
-
Service d'études...
The Ultimate Scientific and Technical Reference
