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http://dx.doi.org/10.4334/JKCI.2011.23.4.511

Evaluation of Strengthening Performance of Stiff Type Polyurea Retrofitted RC Slab Based on Attachment Procedure  

Kim, Jang-Ho Jay (Dept. of Civil and Environmental System Engineering, Yonsei University)
Park, Jeong-Cheon (Dept. of Civil and Environmental System Engineering, Yonsei University)
Lee, Sang-Won (Dept. of Civil and Environmental System Engineering, Yonsei University)
Kim, Sung-Bae (Dept. of Civil and Environmental System Engineering, Yonsei University)
Publication Information
Journal of the Korea Concrete Institute / v.23, no.4, 2011 , pp. 511-520 More about this Journal
Abstract
Recent studies to improve reinforcement of structures have developed stiff type Polyurea by using highly polymized compound Polyurea, but the reinforcing effect of it appears to be merely good. To find the proper usage of Polyurea as structural reinforcement, stiff type Polyurea has developed by manipulating the ratio of the components that consist flexural type Polyurea and the developed stiff type Polyurea shows higher hardness and tensile capacity. The reinforcement effect evaluation of has been performed by the polyurea applied RC slab specimens, and the reinforcement effect of the combination of fiber sheet and polyurea has been tested. The results shows that the Polyurea applied specimens have significant improvement on hardness and ductility compare to those of unreinforced. Also, the specimens that stiff type Polyurea is sprayed on fiber sheet reinforcement has higher reinforcing effect than only sheet reinforced specimens. However, the specimens that and fiber sheet attached after polyurea applied on showed that the high toughness of fiber sheet restrains the ductile behavior of Polyurea due to the high ductility, thereby the specimen suffers the concentration of load, which leads the brittle fracture behavior.
Keywords
stiff type polyurea; reinforced materials; slab; flexural capacity; reinforcement retrofitting;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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