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

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

Descripción

Título: Modelling of chloride penetration into non-saturated concrete: case study application for real marine offshore structures
Autor/es:
  • Da Costa Pereira, Alexandre
  • Fenaux, Michiel
  • Fernandez Gomez, Jaime Antonio
  • Moragues Terrades, Amparo
  • Sanchez Espinosa, Elvira
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 56º Congresso Brasileiro do Concreto. CBC2014
Fechas del Evento: 07/10/2014 - 10/10/2014
Lugar del Evento: Natal, Brasil
Título del Libro: Anais do 56º Congresso Brasileiro do Concreto
Fecha: 2014
ISBN: 2175-8185
Materias:
Palabras Clave Informales: Concrete, Corrosion, Chloride, Capillary Suction, Finite Element Analysis
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ingeniería Civil: Construcción
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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

Más información

ID de Registro: 35318
Identificador DC: http://oa.upm.es/35318/
Identificador OAI: oai:oa.upm.es:35318
URL Oficial: http://ibracon.org.br/eventos/56cbc/
Depositado por: Memoria Investigacion
Depositado el: 25 May 2015 17:52
Ultima Modificación: 25 May 2015 17:52
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