Activated Carbon as a Pseudo-reference Electrode for Potentiometric Sensing Inside Concrete

Activated Carbon as a Pseudo-reference Electrode for Potentiometric Sensing Inside Concrete

Abbas, Y. (University of Twente)
Pargar, F. (TU Delft Microlab)
Olthuis, W (University of Twente)
van den Berg, A. (University of Twente)

Sberveglieri, Giorgio (editor)
Ferrari, Vittorio (editor)

2014

The half-cell potential of the Activated carbon (AC), due to its high double layer capacitance (EDL), remains stable in high ionic electrolyte. The open circuit potential (OCV) of the AC, with EDL of 40 – 50 F, shows a stable potential (10 mV variation) over two weeks in the cement pore solution (sat. Ca(OH)2). The OCV is less sensitive to the pH change from pH 8 to 12 (range inside concrete). The potentiometric response of a Ag/AgCl vs. AC pseudo-reference shows a near-Nernstian response (-51 mV/decade). The AC electrode can be proposed as a pseudo-reference for the potentiometric monitoring inside concrete.

Activated carbon
open circuit potential
pseudo-reference electrode
potentiometric measurement
concrete structures

http://resolver.tudelft.nl/uuid:8b48c489-91a7-49ac-afd1-48c5fe4a2544

https://doi.org/10.1016/j.proeng.2014.11.717

Elsevier

EUROSENSORS 2014, the 28th European Conference on Solid-State Transducers, 87

28th European Conference on Solid-State Transducers, 2014-09-07 → 2014-09-10, Brescia, Italy

Procedia Engineering, 1877-7058, 87

Institutional Repository

conference paper

© 2014 Y. Abbas, F. Pargar, W Olthuis, A. van den Berg