Study on the use of JRR-3 neutron beams for long-term adhesion characteristics of post-installed anchors

Shobu, Takahisa  ; Mukai, Tomohisa*; Ariki, Katsuyoshi*; Choe, H.*; Yamamoto, Shin*; Han, B.*; Morooka, Satoshi  ; Kurita, Keisuke  ; Iikura, Hiroshi  

In this study, we conducted basic research to evaluate the long-term adhesion characteristics of post-installed anchors by using the neutron beam from JRR-3 in the future. The experiments were carried out TNRF and RESA in JRR-3. In the cross-sectional CT image near the center of the concrete, multiple holes artificially created in the concrete inside the iron can with an inner diameter of about 60 mm were clearly photographed. As a result of comparing the dimensions with the actual measurement and the image, it was confirmed that the values were almost the same, and the tip of the hole could be observed with high accuracy.