METHOD TO MEASURE ELECTRIC RESISTANCE OF CARBON NANOTUBE-MIXED CEMENT COMPOSITE USING AC CURRENT

摘要

The present invention relates to a method to measure an electric resistance of a carbon nanotube-mixed cement composite and, more specifically, relates to a method to measure the electric resistance of a carbon nanotube-mixed cement composite from a frequency area impedance spectrum obtained by inputting different AC currents and frequencies into one of two electrodes connected to a carbon nanotube-mixed cement composite, and measuring a voltage output for each of the frequencies inputted into an other electrode. To achieve this purpose, the method to measure the electric resistance of the carbon nanotube-mixed cement composite comprises: a step of forming a circuit in series be embedding two electrodes in a carbon nanotube-mixed cement composite; a step of applying an AC current while changing a frequency of one of the electrodes; a step of measuring an output voltage from an other electrode while the AC current of the specific frequency is being applied; a step of obtaining a frequency area impedance spectrum from an output AC voltage signal and an input AC current signal; a step of converting the obtained spectrum into a Nyquist graph; and a step of obtaining an electric resistance value of the carbon nanotube-mixed cement composite from the converted Nyquist graph.;COPYRIGHT KIPO 2015