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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Carbon Fiber-Reinforced Cementitious Composites for Tensile Strain Sensing
Author(s): Fae Azhari and Nemkumar Banthia
Publication: Materials Journal
Appears on pages(s): 129-136
Keywords: carbon fiber; cement-based sensors; smart materials; structural health monitoring; tensile strain
Abstract:Carbon fiber-reinforced cementitious (CFRC) sensors were prepared by incorporating carbon fiber (CF) fillers into cement paste. The effect of CF content, cement hydration, and electrode type on electrical resistivity was investigated. Following these preliminary characterization experiments, the response of samples with 15% and 20% volume fraction of CF to tensile loading was examined. Under cyclic loading, resistivity increased reversibly, closely following the changes in tensile strain. Both CF contents exhibited piezoresistive behavior, an essential quality for cement-based strain sensors. While the 15% CF sensors provided a high gauge factor of 1250, the gauge factor for the 20% CF sensors, with a smoother and more repeatable response, was much lower at approximately 20.
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