Modelling of chloride penetration into non-saturated concrete: Case study application for real marine off shore structures

Da Costa, A and Fenaux, Michiel and Fernández Gómez, Jaime Antonio and Sánchez., E and Moragues Terrades, Amparo (2013). Modelling of chloride penetration into non-saturated concrete: Case study application for real marine off shore structures. "Construction and building materials", v. 43 ; pp. 217-224. ISSN 0950-0618. https://doi.org/10.1016/j.conbuildmat.2013.02.009.

Description

Title: Modelling of chloride penetration into non-saturated concrete: Case study application for real marine off shore structures
Author/s:
  • Da Costa, A
  • Fenaux, Michiel
  • Fernández Gómez, Jaime Antonio
  • Sánchez., E
  • Moragues Terrades, Amparo
Item Type: Article
Título de Revista/Publicación: Construction and building materials
Date: June 2013
ISSN: 0950-0618
Volume: 43
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Construcción
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The aim of this paper is to explain the chloride concentration profiles obtained experimentally from control samples of an offshore platform after 25 years of service life. The platform is located 12 km off the coast of the Brazilian province Rio Grande do Norte, in the north-east of Brazil. The samples were extracted at different orientations and heights above mean sea level. A simple model based on Fick’s second law is considered and compared with a finite element model which takes into account transport of chloride ions by diffusion and convection. Results show that convective flows significantly affect the studied chloride penetrations. The convection velocity is obtained by fitting the finite element solution to the experimental data and seems to be directly proportional to the height above mean sea level and also seems to depend on the orientation of the face of the platform. This work shows that considering solely diffusion as transport mechanism does not allow a good prediction of the chloride profiles. Accounting for capillary suction due to moisture gradients permits a better interpretation of the material’s behaviour.

More information

Item ID: 25794
DC Identifier: http://oa.upm.es/25794/
OAI Identifier: oai:oa.upm.es:25794
DOI: 10.1016/j.conbuildmat.2013.02.009
Official URL: http://www.sciencedirect.com/science/article/pii/S0950061813001141
Deposited by: Memoria Investigacion
Deposited on: 20 May 2014 08:18
Last Modified: 03 Mar 2020 18:14
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