Experimental Study on Estimation of Water Content and Chloride Ion Content of Concrete by Sub-Terahertz Wave
The application of sub-terahertz waves is being considered as a method to view the corrosion status of internal steel bars. In this study, reflectance intensities were measured for six specimens with different moisture contents using electromagnetic waves from 7.5 to 17.5 GHz. The results showed that the differential reflectance intensity decreased with increasing water content. An equation for estimating the water content at a cover thickness of 10 mm was also calculated. Regarding chloride ion content, no common trend was observed, and it was confirmed that there was a trend in the amount of chloride ions at each cover thickness.
Authors
- Karaki-Doy Toshiro
- Kazuma Iwasaki (ORCID: https://orcid.org/0009-0006-1839-1742)
- Ryosuke Kurashina
- Tadao Tanabe (ORCID: https://orcid.org/0000-0001-5827-4184)
- Tomoya Nishiwaki (ORCID: https://orcid.org/0000-0001-6745-3141)
- Hitoshi HAMASAKI (ORCID: https://orcid.org/0000-0002-1830-3734)
- Akio Tanaka
- Daisuke Sato (ORCID: https://orcid.org/0000-0002-1948-4055)
- Shun Aoki
Institutions
- Shibaura Institute of Technology (JP)
- Kajima Corporation (Japan) (JP)
- Tohoku University (JP)
- Nippon Institute of Technology (JP)
Publication Details
- Published
- 2025-09-12
- DOI
- https://doi.org/10.3390/proceedings2025129046
- Primary Topic
- Terahertz technology and applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00