Smart Materials for Construction
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Abstract
Abstract
With the rapid development of structural health monitoring, intelligence has become an important trend in cement-based materials. Recycled carbon fibers (RCF) feature favorable electrical conductivity. This study investigates the effects of varying fiber contents on the piezoresistive properties of cement mortar. The relationship between electrical signals and stress under failure and cyclic loading was analyzed. Piezoresistive performance was evaluated in terms of linearity, sensitivity, repeatability, and hysteresis, and the damage-sensing capacity was explored via acoustic emission tests. The results reveal that the incorporation of RCF significantly enhances the piezoresistive properties of cement mortar, exhibiting a favorable linear correlation between the fractional change in resistance and stress. Acoustic emission signals and resistivity variations can effectively characterize the internal damage evolution of mortar. Under cyclic loading, recycled carbon fiber cement mortar (RCFCM) presents good repeatability and stability. With rising loading amplitude, the irreversible damage of the conductive network aggravates, and the hysteresis effect increases.
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@article{Lu2026Study,
title = {Study on piezoresistive properties of recycled carbon fiber cement mortar},
author = {Shimin Lu and Dingyi Yang and Kailu Yang and M Zhang and Junbao Yu},
journal = {Journal of Sustainable Cement-Based Materials},
year = {2026},
doi = {10.1080/21650373.2026.2691298},
url = {https://doi.org/10.1080/21650373.2026.2691298}
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