Accelerated degradation protocol of FRPs with heating system and automatic data acquisition using the Arduino platform
DOI:
https://doi.org/10.14295/bjs.v1i7.84Keywords:
Data acquisition, Arduino, FRP degradation, Accelerated protocolAbstract
In general, degradation agents can generate changes in materials through chemical reactions, physical or mechanical processes, leading to a decrease in the performance of composite materials used in strengthening systems. The degradation evaluation can be performed through field tests, environmental aging stations, or in the laboratory using accelerated protocols. In this sense, an automatic system based on the use of the Arduino platform was developed and used in artificially accelerated degradation protocols of concrete beams strengthened with CFRP (Carbon Fiber Reinforced Polymer) sheets, epoxy resins, CFRP, and concrete specimens. The Arduino system was responsible for heating the water of the degradation tank, keeping it within the required temperature range, and recording the data. The obtained results indicate that the proposed Arduino project could heat and maintain the water at a temperature of 50 ± 3 °C over the 42 days of the test. In addition, it was observed the degradation of the epoxy resins used in the strengthening system with reductions of up to 63% in the maximum resistance and 61% in the modulus of elasticity. Regarding the strengthened beams submitted to the standardized accelerated aging protocols, a reduction of 11% in the load-carrying capacity was observed. Finally, it was verified that the degradation protocol did not affect the properties of the concrete and CFRP specimens.
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Copyright (c) 2022 Gláucia Maria Dalfré, Alexandre Alves, Amanda Duarte Escobal Mazzú, Luís António Sarti Júnior
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