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http://dx.doi.org/10.5762/KAIS.2016.17.9.552

Effect of the Embedded Reinforcing Bar of Specimens on the Compressive Strength of Concrete  

Ko, Hune-Bum (Department of Architecture, Inha Technical College)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.9, 2016 , pp. 552-558 More about this Journal
Abstract
Recently, the repair and reinforcement of deteriorated concrete buildings has attracted much interest. In order to accurately evaluate the safety of these existing structures, it is essential to know the strength of the concrete that they are composed of. The core drilling method is considered to be the most effective and common method of assessing the compressive strength of concrete. In general, the regulations do not permit the core specimens within reinforcing bars to be used to assess the strength of the concrete, even if the core specimens contain reinforcing bars in some cases. The purpose of this study is to investigate the effects of the reinforcement arrangement on the compressive strength of concrete, and to propose the quantitative specific standard of strength for core specimens containing reinforcements, in order to facilitate their safe inspection by repair or retrofit companies who want to evaluate the soundness of the structures. To complete this research, one type of cylinder specimen without reinforcement and 14 types of specimens with reinforcement arrangements were prepared and their compressive strength evaluated. It was found that the strength of the cylinders with reinforcement volumes of up to $50cm^3$ (about 4-ϕ13mm) was more than 80% of that of the cylinders without any reinforcement.
Keywords
Concrete cylinder specimen; Concrete core; Concrete compressive strength; Reinforcing bar; Reinforcement arrangement;
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  • Reference
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