Electrical resistivity as microstructural parameter for the calculation of reinforcement service life

Andrade Perdrix, María del Carmen and D'Andrea, Renata (2011). Electrical resistivity as microstructural parameter for the calculation of reinforcement service life. In: "2nd International Symposium on Service Life Design for Infrastructure", 04/10/2010 - 06/10/2010, Delft, Paises Bajos. ISBN 978-2-35158-096-7.

Description

Title: Electrical resistivity as microstructural parameter for the calculation of reinforcement service life
Author/s:
  • Andrade Perdrix, María del Carmen
  • D'Andrea, Renata
Item Type: Presentation at Congress or Conference (Article)
Event Title: 2nd International Symposium on Service Life Design for Infrastructure
Event Dates: 04/10/2010 - 06/10/2010
Event Location: Delft, Paises Bajos
Title of Book: Proceedings of the 2nd International Symposium on Service Life Design for Infrastructure
Date: April 2011
ISBN: 978-2-35158-096-7
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

There is an increasing interest in developing models for prediction of the service life regarding reinforcement corrosion. In present communication a proposal is made based on the electrical resistivity to calculate both the initiation and propagation periods as well as for predicting concrete aging related to durability and for measuring the efficiency of curing. The model is fundamented in that the Resistivity is a property depending on the concrete porous system and its degree of moisture, and then from its values in saturated conditions, it is possible to find relations between diffusivity and resistivity, then linking concrete microstructure and transport resistance. The relation of resistivity and time is quantified through the square root law, either for chloride penetration as for carbonation. However some additional information is needed due to the reaction of chlorides and carbon dioxide with cement phases: the resistivity has to be factorised by a "reaction factor" accounting for it. Concerning the corrosion propagation period the relation between corrosion and resistivity is provided by an expression previously developed by one of the authors. Aging is introduced by measuring the evolution of the resistivity with time. The paper presents an example of application of the model. Finally it is mentioned that the concrete mix can be designed for a target resistivity and that this parameter can also be used as a performance parameter (Corrosion indicator). Being the measurement of resistivity a non destructive method, it can be as well used for on-site quality control.

More information

Item ID: 9333
DC Identifier: http://oa.upm.es/9333/
OAI Identifier: oai:oa.upm.es:9333
Official URL: http://rilem.net/gene/main.php?base=500218&id_publication=74&id_papier=3694
Deposited by: Memoria Investigacion
Deposited on: 24 Oct 2011 10:10
Last Modified: 14 May 2020 08:29
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