Sensores electroquímicos tipo lengua electrónica voltamétrica aplicados al control medioambiental y a la industria alimentaria

Sánchez, I.

doi:10.4995/thesis/10251/28937

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Therefore, the PCA model represents well the information that was gathered through the experiments. This is in good agreement with the scores indicated in other published studies [5,21,22].…”

Section: Validation: Colorimetric Testsupporting

confidence: 93%

Initial proposal of a smart cement-based material to enhance the service-life of reinforcement concrete structures

2023

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The sustainable development of societies can be pursued by simultaneously avoiding the depletion of materials and resources and reducing the greenhouse gases emissions, with related climatic change effects. In order to get this, the extension of structures service-life plays a significant role in saving natural resources, decreasing the overall anthropogenic carbon-footprint, and reducing building and demolition wastes. In order to achieve such prolongation of structures service-life, one of the most promising approaches is the development of Smart Structures. These are defined as structures that are able to self-sense some external stimuli such as stress or temperature variations, and internal conditions such as chloride penetration, concrete carbonatation, etc. Consequently, ongoing damage phenomena can be detected promptly, thus allowing to implement suitable countermeasures in the most efficient way. Smart Structures can also process the information and respond autonomously in real time by using smart materials technologies such as self-healing technology. In this study we propose a preliminary version of a smart material system with self-healing and sensing properties, to demonstrate its effectiveness at a proof of concept level. The effectiveness of an active, capsule-based self-healing system in blocking chloride penetration through the crack and the effectiveness of voltametric Ag sensors in detecting the presence of chlorides were investigated experimentally. High-performance cement mortar was chosen as the material to be studied, in order to ensure that optimal behaviour could be observed in non-cracked conditions.

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Section: Validation: Colorimetric Testsupporting

confidence: 93%

Initial proposal of a smart cement-based material to enhance the service-life of reinforcement concrete structures

2023

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“…The system is novel due to the use of voltammetric sensors, which are virtually never used in RCS. Their efficiency is widely verified in industries such as food or wastewater [5,6]. In these sensors an excitation potential sweep is applied, as response the sensors emit an electric current at each potential which is associated with a specific reaction.…”

Section: Introductionmentioning

confidence: 99%

Initial proposal of a novel voltammetric sensor system for the detection of concrete carbonation by means of PCA model

et al. 2023

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The monitoring of concrete carbonation takes an important role in the structures maintenance, considering that corrosion induced by this phenomenon is one of the mainly failure causes in the Reinforcement Concrete Structures (RCS) located in industrial zones, roads and cities. Carbonation of concrete is produced by the penetration of the CO2 inside of the porous net, which is mainly combined with the Ca(OH)2 contained in the concrete pore solution producing carbonates with low solubility and eventually causing a pH drop until neutral levels. The pH drop produces the instability and final generalised destruction of the rebars passive layers, which is the step that precedes generalized corrosion. The current existing systems to detect concrete carbonation are based on potentiometric sensors to detect the pH of concrete pore solution. These have some limitations such as the interference of different reactions on the sensor surface. Considering these limitations, in this study a novel system of voltammetric Au sensors embedded in concrete for the detection of concrete carbonation was presented. In the voltammetric sensor, the potential sweep signal applied comprises the potential range where the effect of the pH variations has more influence in the sensor response. Then the response processing by means of the multivariate analysis PCA (principal component analysis) allows to manage a huge quantity of variables and to reduce the effect of the interference with other analytes, increasing the importance of the pH changes effect in the obtained data. Thus, increasing the reliability of the system to detect the concrete carbonation.

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Hardened Concrete State Determination System Based on a Stainless Steel Voltammetric Sensor and PCA Analysis

Ibernon¹,

Gasch²,

Romero³

et al. 2022

IEEE Sensors J.

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Sensores electroquímicos tipo lengua electrónica voltamétrica aplicados al control medioambiental y a la industria alimentaria

Cited by 3 publications

References 7 publications

Initial proposal of a smart cement-based material to enhance the service-life of reinforcement concrete structures

Initial proposal of a smart cement-based material to enhance the service-life of reinforcement concrete structures

Initial proposal of a novel voltammetric sensor system for the detection of concrete carbonation by means of PCA model

Hardened Concrete State Determination System Based on a Stainless Steel Voltammetric Sensor and PCA Analysis

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