On the effect of addition of carbon nanotubes on the electric conductivity of alkali-activated slag mortars

FIBRE CONCRETE 2017

Kusak, I.^1 ; Lunak, M.^1

Institute of Physics, Faculty of Civil Engineering, Brno University of Technology, Veveri 95, Brno

602 00, Czech Republic^1

关键词: Alkali activated;    Alkali activated slags;    Coaxial probe;    Effect of addition;    Frequency ranges;    Higher frequencies;    Impedance spectroscopy;    Non-destructive measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/246/1/012044/pdf
DOI  :  10.1088/1757-899X/246/1/012044

来源: IOP

【 摘 要 】

This paper presents basic electric properties of laboratory prepared alkali-activated composite materials on the basis of finely ground granular high furnace slag to which various quantities of carbon nanotubes (CNT) have been added. Impedance spectroscopy in the frequency range from 40 Hz to 1 MHz was used to measure the specimens. Electric resistivity ρ versus frequency and electric resistivity ρ versus CNT content relationships were examined on our specimens R&S ZNC vector analyser with DAK-12 coaxial probe (made by Speag) was used to carry out the measurements at higher frequencies (from 100 MHz to 3 GHz). Electric conductivity σ as a function of the frequency and as a function of the specimen CNT content was studied in this frequency range. Up-to-date instruments and a unique approach have evidently been employed to carry out non-destructive measurement of mortar materials.