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

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

Descripción

Título: Electrical resistivity as microstructural parameter for the calculation of reinforcement service life
Autor/es:
  • Andrade Perdrix, Maria del Carmen
  • D'Andrea, Renata
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 2nd International Symposium on Service Life Design for Infrastructure
Fechas del Evento: 04/10/2010 - 06/10/2010
Lugar del Evento: Delft, Paises Bajos
Título del Libro: Proceedings of the 2nd International Symposium on Service Life Design for Infrastructure
Fecha: Abril 2011
ISBN: 978-2-35158-096-7
Materias:
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 9333
Identificador DC: http://oa.upm.es/9333/
Identificador OAI: oai:oa.upm.es:9333
Depositado por: Memoria Investigacion
Depositado el: 24 Oct 2011 10:10
Ultima Modificación: 20 Abr 2016 17:47
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