2018 Volume 74 Issue 1 Pages 66-79
In response to the aging of social infrastructure, it is required to evaluate deterioration damage of concrete structure due to sophistication of maintenance technology. Authors have been developing a X-ray inspection system using mobile linac X-ray sources for bridge inspection, and trying to evaluate the state of tendons existing inside of a concrete bridge by transmission X-ray inspection. We also intend to inspect the state of grout. We have already carried out X-ray inspection system on actual bridges, but quantifying the relationship between concrete thickness and transmission X-ray imaging capability has become a problem in securing accurate inspection. For this reason, in this research, we investigated the response of X-rays with different thicknesses of concrete, and made basic studies to improve the inspection accuracy. From that, we can specify the applicable concrete thickness of each portable X-ray source. And the performance of the mobile linac X-ray source was evaluated.
