Cover cracking of the reinforced concrete due to rebar corrosion induced by chloride penetration

Gálvez Ruiz, Jaime and Guzmán Gutiérrez, Santiago and Sancho Aznal, José María (2013). Cover cracking of the reinforced concrete due to rebar corrosion induced by chloride penetration. In: "8th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-8)", 11/03/2013 - 14/03/2013, Toledo (España). ISBN 978-84-941004-1-3. pp. 1844-1854.

Description

Title: Cover cracking of the reinforced concrete due to rebar corrosion induced by chloride penetration
Author/s:
  • Gálvez Ruiz, Jaime
  • Guzmán Gutiérrez, Santiago
  • Sancho Aznal, José María
Item Type: Presentation at Congress or Conference (Article)
Event Title: 8th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-8)
Event Dates: 11/03/2013 - 14/03/2013
Event Location: Toledo (España)
Title of Book: Fracture mechanics of concrete and concrete structures : proceedings of the 8th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-8), held in Toledo, Spain, 11-14 March 2013
Date: March 2013
ISBN: 978-84-941004-1-3
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

Este artículo estudia el proceso de fisuración del hormigón por corrosión de la armadura. Se presenta un modelo de transporte de cloruros en el hormigón, que contempla la no-linealidad de los coeficientes de difusión, las isotermas de absorción y el fenómeno de convección. A partir de los resultados de penetración de cloruros, se establece la corrosión de la armadura con la consiguiente expansión radial. La fisuración del hormigón se estudia con un modelo de fisura embebida. Los dos modelos (iniciación y propagación) se incorporan en un programa de elementos finitos. El modelo se contrasta con resultados experimentales, obteniéndose un buen ajuste. Una de las dificultades es establecer el umbral de concentración de cloruros que da lugar al inicio de la corrosión de la armadura.This paper is focused on the chloride-induced corrosion of the rebar in RC. A comprehensive model for the chloride ingress into concrete is presented, with special attention to non-linear diffusion coefficients, chloride binding isotherms and convection phenomena. Based on the results of chloride diffusion, subsequent active corrosion is assumed and the radial expansion of the corroded reinforcement reproduced. For cracking simulation, the Strong Discontinuity Approach is applied. Both models (initiation and propagation corrosion stages) are incorporated in the same finite element program and chained. Comparisons with experimental results are carried out, with reasonably good agreements being obtained, especially for cracking patterns. Major limitations refer to difficulties to establish precise levels of basic data such as the chloride ion content at concrete surface, the chloride threshold concentration that triggers active corrosion, the rate of oxide production or the rust mechanical properties.

More information

Item ID: 29857
DC Identifier: http://oa.upm.es/29857/
OAI Identifier: oai:oa.upm.es:29857
Official URL: http://www.framcos8.org/frontal/default.asp
Deposited by: Memoria Investigacion
Deposited on: 04 Jul 2014 12:40
Last Modified: 01 Jun 2018 12:46
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