Long term performance of a sensor for oxygen evaluation in concrete

Author(s): M. J. Correia, M. M. Salta
Paper category: Workshop
Book title: International RILEM Workshop on Integral Service Life Modelling of Concrete Structures
Editor(s): R.M. Ferreira, J. Gulikers, C. Andrade
Print ISBN: 978-2-35158-058-5
e-ISBN: 978-2-35158-090-5
Publisher: RILEM Publications SARL
Pages: 175 - 184
Total Pages: 10
Language: English

Abstract: 
The main objective of the present study is to evaluate the long term performance of a sensor to be used for monitoring the oxygen availability in concrete. The developed sensor consists of platinum or stainless steel as working electrodes, graphite as a counter electrode, and activated titanium as a reference electrode. The measurements of the limiting current density due to oxygen reduction have been made in concrete specimens under different conditions of water and oxygen accessibility to the concrete. The results obtained in this study show that the sensor maintains the ability to detect oxygen content variations in the interstitial solution of the concrete, for almost 6 years after its embedment.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00