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Title |
Durability Performance Evaluation of PolyUrea for Seismic Retrofitting of RC Structures
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Authors |
조철민(Chul-Min Cho) ; 김장호(Jang Jay Ho Kim) ; 이두성(Doo-Sung Lee) ; 김태균(Tae-Kyun Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.3.001 |
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Keywords |
내진 ; 보수 ; 보강 ; 폴리우레아 ; 내구성능평가 Seismic ; Reinforcement ; Retrofitting ; PolyUrea ; Durability Performance Evaluation |
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Abstract |
An experimental study is needed a reinforcing method for seismic load to apply for RC structures because a lot of earthquakes have frequently happened in the world and those also collapsed infrastructures or damaged human lives. The reinforcing effect of PolyUrea (PU) appeared to be excellent under blast and impact about RC structures. In this study, Stiff Type PolyUrea (STPU) had developed by manipulating the ratio of the components of prepolymer and hardener of PU. And the durability performance evaluation of STPU for deterioration and chemical resistance has been performed. Acid environmental exposure test and ultraviolet (UV) exposure test have been performed as the durability performance evaluation for STPU. Concrete carbonation exposure test and freezing and thawing test for concrete coated with STPU have been performed. The experimental result showed that STPU has high resisting capacity and durability in all tests. Therefore, STPU would be used as seismic reinforcement materials.
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