Influence of Plasma Modified Carbon Nanotubes on the Resistance Sensitiveness of Cement

Abstract

The surface of carbon nanotubes (CNTs) was modified by plasma to improve the dispersion, conductivity and adsorption properties of carbon nanotubes. Cement-based composites made with plasma-treated carbon nanotubes (P-CNTs) at different perntages were tested under repeated cyclic axial compressive stress by four electrode methods to measure the electric resistance. Those made with CNTs without plasma treatment as controls were tested also. The results showed that electric resistance change values of the cement mortar with P-CNT and CNT were all monatomic corresponding to the cyclic loading. When the water-cement ratio of the mortar was fixed, increasing of the P-CNT/CNT content would increase the resistance change value of the mortars added with P-CNT/CNT, and the sensitivity performance. It has certain engineering application value

Keywords

carbon nanotubes / cement mortar / resistance change / smart performance