Experimental Investigation on the Compressive Stress-Sensing Ability of Steel Fiber-Reinforced Cement-Based Composites under Varying Temperature Conditions

This study investigates the piezoresistive (self-sensing) properties of short stainless-steel fiber-reinforced mortar under varying temperature conditions. Different reinforced mortars were produced by fiber and aggregate content. First, Electrical Impedance Spectroscopy (EIS) measurements used to characterize electrical specimens. EIS performed at temperatures 24 °C, 35 50 °C. Second, investigate self-sensing capacity different composites, fractional changes impedance 1 kHz monitored two conditions: variation alone (cooling down from °C or room temperature), combined with cyclic compressive loading (up 5 MPa). The results former compensate for effect variations in latter. Both mechanical meaningful piezoresistivity investigated composites. Conclusions are drawn respect stress sensitivity real imaginary parts highest volume fraction (0.01%) higher content (volume 60%) distinctly sensitive stress, which suggests possibility using same composite as a sensor.