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Self-sensing concrete made from recycled carbon fibres

机译：自我传感混凝土由再生碳纤维制成

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摘要

The electrical and piezo-resistive responses of recycled carbon fibre (rCF)-reinforced concrete is analysed in this article. Two different PAN-based rCFs (monofilament rCF and fibrillated rCF sheets) incorporated into dry concrete mix were investigated. Piezo-resistivity was evaluated by simultaneously monitoring the variation in the applied DC voltage during both flexural and compressive tests. Although both plain and rCF-reinforced concrete samples showed piezoresistive responses, the latter show increased signal-to-noise-ratio and thus behave like selfsensing materials. The electrical behaviour suggests a mixed control owing to both ionic and electronic conductivity, with the dominant one depending on the rCF content and rCF dispersion. This work enhances the possibility of generalising the use of smart cementitious materials in the civil engineering industry.
机译：在本文中分析了再生碳纤维（RCF） - 重新胁迫混凝土的电气和压电响应。 研究了掺入干混凝土混合物中的两种不同的泛基RCF（单丝RCF和原纤化RCF片材）。 通过同时监测弯曲和压缩测试期间施加的DC电压的变化来评估压电率。 尽管普通和RCF泛燃的混凝土样本都显示出压阻反应，但后者显示出增加的信噪比，因此表现出自敏感材料。 由于离子和电子电导率，电力行为提出了混合的控制，这取决于RCF含量和RCF分散。 这项工作提高了在土木工程行业中揭开使用智能胶凝材料的可能性。

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