Design of smart nickel powder-filled cement-based composites and their wireless measurement system

Smart nickel powder-filled cement-based composites and its wireless measurement system are developed for health monitoring of concrete structures. Firstly, the smart nickel powder-filled cement-based composites are fabricated, and its measurement principle and performance are analyzed. Secondly, the wireless stress/strain measurement system is integrated with the composites. Finally, the experiment on wireless stress/strain measurement system integrated with smart nickel powder-filled cement-based composites is finished. Experimental results indicate that the electrical resistivity of smart nickel powder-filled cement-based composites changes linearly and reversibly with the compressive stress/strain; The sensitivity and resolution of the wireless stress/strain measurement system integrated with smart nickel powderfilled cement-based composites are respectively 16. 894% MPa^-1/0.133 65% με^-1 (a gauge factor of 1 336. 5) and 150 Pa/0. 02 με The newly-developed wireless stress/strain measurement system integrated with smart nickel powder-filled cement-based composites has such advantages as high sensitivity to stress/strain, high stress/strain resolution, simple circuit, and is fit for structural health monitoring.