Evaluation of Bond Repair Effect for Ultra-high-strength Concrete Specimens by Neutron Diffraction Method
Source abstract
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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Innovative concrete reinforcement materials · Structural Behavior of Reinforced Concrete · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Architecture, Graduate School of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, Japan.
Technical Research Institute, Technical Promotion Division, Haseko Corporation, 3-1-1 Tsurumaki, Tama, Tokyo, Japan.
Utilization Promotion Division, Neutron Science and Technology Center, CROSS, 162-1 Shirakata, Tokai, Ibaraki, Japan.
Technical Research Institute, Hazama Ando Corporation, 515-1 Karima, Tsukuba, Ibaraki, Japan.
Technology Development Office, Daisue Construction, 1-7-27 Shinsuna, Koto-ku, Tokyo, Japan.
Institute of Technology, Tokyu Construction, 3062-1 Tana, Sagamihara, Kanagawa, Japan.
Building Technology Group, Research Institute, Nishimatsu Construction, 2-2-1 Toranomon, Minato-ku, Tokyo, Japan.
Material Sciences Research Center, Sector of Nuclear Science Research, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki, Japan.
Department of Fire Engineering, Building Research Institute, 1 Tachihara, Tsukuba, Ibaraki, Japan.
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