NDLI: Chloride penetration into concrete in marine environment—Part I: Main parameters affecting chloride penetration

Content Provider	Springer Nature Link
Author	Costa, A. Appleton, J.
Copyright Year	1999
Abstract	The durability of concrete structures exposed to marine environment depends mainly on the ability of concrete to resist to chloride ingress. This complex phenomenon depends on many parameters related to the concrete properties and to the micro-environmental characteristics. This paper presents the results of an experimental study where fifty four 1.0×0.5×0.12 m concrete panels were exposed to marine environment for three to five years. A study of three concrete mixes in five different exposure conditions was conducted and the results show that the chloride penetration is strongly dependent on both the concrete quality and the exposure conditions. Both the diffusion coefficientsD and the surface chloride concentrationCs derived from the chloride profiles show a clear time dependence. This effect has serious implications for long term predictions of chloride penetration, therefore if constant values ofD andCs are assumed gross errors can be made.La durabilité des structures en béton soumises à l'environnement marin dépend surtout de la capacité du béton à résister à la pénétration des chlorures. Ce phénomène est très complexe et dépend de plusieurs paramètres qui ont trait aux propriétés du béton et aux caractéristiques du micro-environnement. Cette étude présente les résultats d'une recherche expérimentale sur 54 éprouvettes de béton de 1,0×0,5×0,12 m, qui ont été soumises à l'environnement marin pendant 3 à 5 ans. Trois compositions de béton et cinq types d'exposition ont été étudiés. Les résultats montrent clairement que la pénétration des chlorures dépend en grande partie de la qualité du béton et du type d'exposition. Le coefficient de diffusion D et la concentration des chlorures à la surface du béton Cs varient considérablement avec le temps. Cet effet a une grande influence sur la prédiction de la pénétration à long terme et, par conséquent, le fait de considérer les coefficients D et Cs comme constants peut être à l'origine de grandes erreurs.
Starting Page	252
Ending Page	259
Page Count	8
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	32
Issue Number	4
e-ISSN	18716873
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1999-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Theoretical and Applied Mechanics Structural Mechanics Mechanical Engineering Operating Procedures, Materials Treatment Civil Engineering Building Materials
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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