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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.
Title: | Modelling of chloride penetration into non-saturated concrete: case study application for real marine offshore structures |
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Author/s: |
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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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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
Item ID: | 35318 |
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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 |