S.R. Tripathi, H. Ogura, H. Inoue, T. Hasegawa, K. Takeya, K. Kawase
Corrosion Sci. Vol. 62, pp. 5-10
2012
Femtolite FX-100
We have employed Terahertz time domain spectroscopy (THz-TDS) to investigate the Chloride ion (Cl-) concentration in concrete structures. Cement paste and mortar samples with different Cl- concentrations were prepared and their absorption coefficients were measured in the sub-Terahertz frequency range. In both cases, the absorption coefficient increases with the increase in Cl- concentration and a good linear relationship between them is observed. Our results demonstrate that the THz-TDS could be a valuable tool to monitor and inspect the Cl- concentration in concrete structures.
