An NDT performance-related proposal based on electrical resistivity to the specification of concrete durability

Author(s): C. Andrade, O. Río, A. Castillo, M. Castellote, R. d’Andrea
Paper category: Workshop
Book title: International RILEM Workshop on Performance Based Evaluation and Indicators for Concrete Durability
Editor(s): V. Baroghel-Bouny, C. Andrade, R. Torrent, K. Scrivener
ISBN: 978-2-912143-95-2
Pages: 51 - 58
Total Pages: 8
Language: English

Abstract: 
Prediction of the time to reinforcement corrosion and service life duration is being a subject of increasing interest. In present communication a proposals is made on using the electrical resistivity to calculate both the initiation and propagation periods. The main advantage is that resistivity is an inexpensive non destructive measurement that can be used for routine quality control. For the time to corrosion onset, the electrical resistivity represents the porosity and its connectivity and therefore can be used to model transport processes. 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 propagation period, the electrical resistivity is an indication of the moisture content of concrete and therefore, it has a certain relationship with the corrosion cement. A model is proposed in which the resistivity is introduced in the square root of time law.

Online publication: 2007
Publication Type: full_text
Public price (Euros): 0.00