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Piezoresistive Cement-Based Materials for Strain Sensing

Composite Materials Research Laboratory, University at Buffalo, The State University of New York, Buffalo, NY 14260-4400, USA, ddlchung{at}eng.buffalo.edu

Cement-based materials that exhibit piezoresistivity with sufficient magnitude and reversibility contain electrically conductive fibers. The phenomenon allows the materials to sense their own strain. The fibers are preferably discontinuous. Carbon fibers (15 mm diameter) are most effective. Steel fibers (8 mm diameter) are less effective. Carbon filaments (0.1 mm diameter) are ineffective. The piezoresistive behavior, mechanism and materials are reviewed, including cement-based materials with continuous and discontinuous fibers.

Key Words: cement • concrete • strain sensor • piezoresistive • carbon fiber • steel fiber

Journal of Intelligent Material Systems and Structures, Vol. 13, No. 9, 599-609 (2002)
DOI: 10.1106/104538902031861


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