Piezoelectric cement-based materials with large coupling and voltage coefficients

Abstract

Cement paste containing short steel fibers (8 μm diameter, 0.18 vol.%) and polyvinyl alcohol (0.16 vol.%) exhibits longitudinal piezoelectric coupling coefficient d=2.5×10−11 m/V and piezoelectric voltage coefficient g=1.1×10−3 m2/C (10 kHz), compared to values of d=3.0×10−13 m/V and g=1.1×10−3 m2/C for cement paste without admixture, and values of d=1.4×10−11 m/V and g=1.5×10−3 m2/C for lead zirconotitanate (PZT).