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http://dx.doi.org/10.5345/JKIBC.2014.14.3.216

Bonding Properties of Steel-reinforced Polymer Cement Mortar Evaluated by Pull-off Test and FEM Modeling  

Park, Dong-Cheon (Department of Architectural Engineering, Korea Maritime and Ocean University)
Yoneda, Nobutosi (Ministry of Land, Infrastructure, Transport and Tourism of Japan)
Cho, Bong-Suk (Research Institute of Industrial Science &Technology (RIST), Slag Utilization Researcher Team)
Publication Information
Journal of the Korea Institute of Building Construction / v.14, no.3, 2014 , pp. 216-222 More about this Journal
Abstract
Chloride attack to reinforced concrete structures located in seaside can cause a serious problem of durability and maintenance during the service life. Corrosion of reinforced steel bars in concrete decreases the bond strength and finally causes the detachment of concrete cover. Polymer cement mortar is usually adopted to repair the deteriorated RC structures because of its strong bonding property. The recovered load-carrying capacity after the repair was simulated by non-linear FEM analysis. The properties of concrete, repairing materials, bonding materials and reinforced bar were used as input data. Four types of redispersible polymer powders were used as components of polymer cement mortar. Pull-off tests were carried out to examine the bond properties such as rigidity and strength. Effects of a corrosion inhibitor and the loss of reinforced bars due to the corrosion were also considered in this study. FEM modeling and analysis were conducted to propose the universal model. Physical bonding in the relationship between repair materials and steel reinforced bar is more dominant than chemical bonding.
Keywords
repair materials; bond property; pull-off test; polymer cement mortar; FEM analysis;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
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