Evaluation of Bond Repair Effect for Ultra-high-strength Concrete Specimens by Neutron Diffraction Method
Year: 2023
Type: article
Abstract: The purpose of this study was to evaluate the use of resin injection to repair cracks in ultra-high-strength concrete (UHSC) members. As a preliminary step, the applicability of the neutron diffraction method (NDM) to investigate the effect of repairs in UHSC specimens was examined. The experimental results showed that the NDM can measure stresses in rebars in UHSC and normal concrete specimens. Therefore, in this experiment, the NDM was used to measure the bond performance of repairs with epoxy resin around the slit in normal concrete and UHSC specimens and examine the effect of repair on the UHSC specimens. Displacement around the slit was measured using a PI-shape displacement transducer. The evaluation confirmed that the bond performance of the repaired area was recovered by resin injection regardless of the concrete strength. In addition, the displacement around the slit was smaller for the injected specimens than the non-injected specimens. These experimental results clarified that by injecting resin, the same bond repair effect could be obtained in UHSC and normal concrete specimens.
DOI: 10.3151/jact.21.337
Authors: Ayumu Yasue, Kensuke Kobayashi, Masahiro Yoshioka, Takashi Noma, Koichi Okuno, Seiichiro Tanaka, Yoshikazu Hirata, Tokunao Oh-oka, Yoshiharu Kimura, Tomoya Nagai, Takahisa Shobu, Yuhei Nishio, Manabu Kanematsu
Institutions: Tokyo University of Science, Haseko Corporation (Japan), Comprehensive Research Organization for Science and Society, CROSS Neutron Science and Technology Center, Hazama ANDO Corporation (Japan), Daisue Construction Co., Ltd. (Japan), Tokyu Construction Co., Ltd. (Japan), Nishimatsu Construction Co., Ltd. (Japan), Japan Atomic Energy Agency, Building Research Institute
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4367693429