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Título: | An embedded‐sensor approach for concrete resistivity measurement in on‐site corrosion monitoring: Cell constants determination |
Autor: | Ramón Zamora, Jose Enrique CSIC ORCID; Martínez Sierra, Isabel ; Gandía-Romero, José Manuel; Soto, Juan | Palabras clave: | Structure health monitoring Resistivity Sensor Non-destructive techniques Steel corrosion Reinforced concrete Durability |
Fecha de publicación: | 2-abr-2021 | Editor: | Molecular Diversity Preservation International | Citación: | Sensors 21:2481 (2021) | Resumen: | The concrete electrical resistivity is a prominent parameter in structural health monitor-ing, since, along with corrosion potential, it provides relevant qualitative diagnosis of the reinforcement corrosion. This study proposes a simple expression to reliable determine resistivity from the concrete electrical resistance (RE) provided by the corrosion sensor of the Integrated Network of Sensors for Smart Corrosion Monitoring (INESSCOM) we have developed. The novelty here is that distinct from common resistivity sensors, the cell constants obtained by the proposed expression are intended to be valid for any sensor implementation scenario. This was ensured by studying most significant geometrical features of the sensor in a wide set of calibration solutions. This embedded-sensor approach is intended to be applicable for RE measurements obtained both using potential step voltammetry (PSV, used in the INESSCOM sensor for corrosion rate measurement) and alter-nating current methods. In this regard, we present a simple protocol to reliably determine RE, and therefore resistivity, from PSV measurements. It consists in adding a very short potentiostatic pulse to the original technique. In this way, we are able to easy monitor resistivity along with corrosion rate through a single sensor, an advantage which is not usual in structural health monitoring. | Versión del editor: | http://dx.doi.org/10.3390/s21072481 | URI: | http://hdl.handle.net/10261/257938 | DOI: | 10.3390/s21072481 | Identificadores: | doi: 10.3390/s21072481 issn: 1424-8220 |
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