1. Non-destructive testing of reinforced concrete structures using sub-terahertz reflected waves
- Author
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Chihiro Kobayashi, Tomoya Nishiwaki, Tadao Tanabe, Takahiro Oohashi, Hitoshi Hamasaki, Shuya Hikishima, Akio Tanaka, Koji Arita, Sho Fujii, Daisuke Sato, and Takeshi Kidokoro
- Subjects
Sub-terahertz wave ,Reinforced concrete structures ,Camera ,Non-destructive ,Non-contact ,Cracks ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Building construction ,TH1-9745 - Abstract
Terahertz (THz) and sub-terahertz (sub-THz) waves are unexplored waves between the infrared and microwave ranges. This range features unique characteristics of both light resolution and electromagnetic wave transmission. Sub-THz waves are part of attractive new diagnostic methods for inner objects because they are safer than normal non-destructive inspection methods involving high energy, such as X-rays. In this study, a novel non-contact and non-destructive inspection method for reinforced concrete (RC) structures using sub-THz reflection imaging is proposed to inspect the deterioration of inaccessible damaged RC structures. The results of this study confirmed that the proposed sub-THz imaging method can detect cracks and voids in concrete, as well as in metals inside or behind the concrete, based on differences in reflectance. In addition, the camera-based measurement system makes real-time on-site field measurements possible.
- Published
- 2024
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