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http://dx.doi.org/10.12652/Ksce.2010.30.2A.169

Development and Applicability Evaluation of High Performance Poly-urea for RC Construction Reinforcement  

Kim, Sung Bae (연세대학교 토목공학과)
Kim, Jang-Ho Jay (연세대학교 사회환경시스템공학부)
Choi, Hong-Shick (충청대학 건설교통과)
Heo, Gweon (충청대학 실용소재과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.2A, 2010 , pp. 169-176 More about this Journal
Abstract
Generally, poly-urea is widely used as waterproof coating material due to its superior adhesiveness, elongation capacity, and permeability resistance. In addition, it can be quickly and easily applied on structure surfaces using spray application. Since it hardens in about 30 seconds after application, its construction efficiency is very high and its usage as a special functional material is also excellent. However, currently, poly-urea is mostly used as waterproof coating material and the researches on its usage as a retrofitting material is lacking at best. Therefore, basic studies on the use of poly-urea as a general structural retrofitting material are needed urgently. The objective of this study is to develop most optimum poly-urea composition for structure retrofitting purpose. Moreover, the structural strengthening capacity of the developed poly-urea is evaluated through flexural capacity experiments on RC beams and RC slabs. From the results of the flexural test of poly-urea strengthened RC beam and slab specimens, the poly-urea and concrete specimen showed monolithic behavior where ductility and ultimate strength of the poly-urea strengthened specimen showed slight increase. However, the doubly reinforced specimens with FRP sheet and poly-urea showed lower capacity than that of the specimen reinforced only with FRP sheet.
Keywords
poly-urea; RC beam; slab; flexural capacity; FRP sheet;
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Times Cited By KSCI : 2  (Citation Analysis)
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