Bond Strength of Post-installed Anchor Adhering to Damaged Concrete by Freeze-thaw Action
Source abstract
Abstract
Reinforced concrete (RC) structures in cold regions are susceptible to surface deterioration due to freeze-thaw cycles (FTC). For sustainable development goals (SDGs) and a decarbonized society, damaged structures should be repaired and reinforced. Post-installed anchors are commonly used for seismic retrofitting and equipment fixation. However, research on the bond characteristics of damaged concrete is limited. Therefore, in this study, the bonding performance of adhesive anchors in damaged concrete was investigated. Liquid nitrogen was employed to subject the concrete surface to FTC; subsequently, bond-slip tests were conducted with the degree of deterioration serving as a parameter. The results suggested, the bond strength decreased as the degree of damage increased. The reduction ratios of the post-installed anchor with epoxy and cement-based resins were almost identical. Furthermore, a bond strength equation was proposed by referring to the bond-slip model between the rebar and concrete (fib 1990). The test results were well predicted with a correlation coefficient of 0.94. This study is based on previous studies (Yano et al. 2022, 2023) but presents new findings.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Concrete Corrosion and Durability · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Environmental Technology, Muroran Institute of Technology, Mizumoto 27-1, Muroran, Hokkaido, Japan.
College of Design and Manufacturing Technology, Muroran Institute of Technology, Mizumoto 27-1, Muroran, Hokkaido, Japan.
Research and Development Department, TOBISHIMA CORPORATION, Kimagase 5472, Noda, Chiba, Japan.
Sales Engineering Division, Hilti Japan Ltd., Chigasakiminami 2-6-20, Tsuzuki-ku, Yokohama, Kanagawa, Japan.
References (25)
Show source-provided references
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