Modelling of chloride penetration into non-saturated concrete: case study application for real marine offshore structures

Da Costa Pereira, Alexandre and Fenaux, Michiel and Fernández Gómez, Jaime Antonio and Moragues Terrades, Amparo and Sanchez Espinosa, Elvira (2014). Modelling of chloride penetration into non-saturated concrete: case study application for real marine offshore structures. In: "56º Congresso Brasileiro do Concreto. CBC2014", 07/10/2014 - 10/10/2014, Natal, Brasil. ISBN 2175-8185. pp. 1-17.

Description

Title: Modelling of chloride penetration into non-saturated concrete: case study application for real marine offshore structures
Author/s:
  • Da Costa Pereira, Alexandre
  • Fenaux, Michiel
  • Fernández Gómez, Jaime Antonio
  • Moragues Terrades, Amparo
  • Sanchez Espinosa, Elvira
Item Type: Presentation at Congress or Conference (Article)
Event Title: 56º Congresso Brasileiro do Concreto. CBC2014
Event Dates: 07/10/2014 - 10/10/2014
Event Location: Natal, Brasil
Title of Book: Anais do 56º Congresso Brasileiro do Concreto
Date: 2014
ISBN: 2175-8185
Subjects:
Freetext Keywords: Concrete, Corrosion, Chloride, Capillary Suction, Finite Element Analysis
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: 35318
DC Identifier: http://oa.upm.es/35318/
OAI Identifier: oai:oa.upm.es:35318
Official URL: http://ibracon.org.br/eventos/56cbc/
Deposited by: Memoria Investigacion
Deposited on: 25 May 2015 17:52
Last Modified: 03 Mar 2020 18:28
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