About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
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| Symposium
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Nanocomposite Materials: Innovations in Design, Fabrication, and Applications
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| Presentation Title |
Environmental Effects on the Electrical Behavior of Self-Sensing Cementitious Composites Containing Conductive Carbon Black Nanoparticles
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| Author(s) |
Anne Vitória Cunha dos Santos, Luma Barbosa Costa, Afonso Rangel Garcez De Azevedo, Gustavo Henrique Nalon |
| On-Site Speaker (Planned) |
Anne Vitória Cunha dos Santos |
| Abstract Scope |
Smart urban infrastructures rely on reliable structural health monitoring systems due to the continuous degradation of engineering structures. Given the gap in the literature regarding environmental effects on the electrical resistivity of self-sensing concretes, this study investigated the influence of moisture conditions on the electrical behavior of cementitious composites containing carbon black nanoparticles. Three composites were produced and exposed to two environmental conditions after curing: (i) field conditions with relative humidity (RH) fluctuations between 40% and 90%, and (ii) a moist chamber with 100% RH. Temperature and RH were monitored over ten days, while electrical resistivity was evaluated using the biphasic direct current method.Results showed that environmental moisture significantly affected the electrical resistivity of the composites. Nonlinear regression models were developed to compensate for the effects of moisture and temperature on the electrical resistivity of the cementitious sensors. The observed variations highlight the strong dependence of the electrical response on environmental conditions and demonstrate the potential of nonlinear regression models to improve the reliability of cementitious sensors for structural health monitoring applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Characterization |