This study analyzed the effects of ultra-low concentrations of multiwalled carbon nanotubes (MWNT) on the electromechanical properties of cement paste. Here, 0.025 and 0.050 wt % of MWNTs were dispersed using a poly(sodium 4-styrenesulfonate) aqueous solution, which was then used for casting specimens. Because these concentrations make large-scale applications much more feasible, sample consistency and effects of saturation were also studied. Their resistivity ranges and strain sensing properties ( i.e. , gage factors) were characterized.