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Title |
Residual Bond Strength of Polymer-modified Mortars Using Re-dispersible Polymer Powder at Elevated Temperature
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Authors |
장건영(Kun-Young Jang) ; 류동우(Dong-Woo Ryu) |
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DOI |
https://doi.org/10.4334/JKCI.2019.31.4.339 |
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Keywords |
폴리머 시멘트 모르타르; 재유화형 폴리머; 내화성능; 폭렬; 부착강도 polymer cement mortar; re-dispersible polymer; fire resistance; spalling; bonding strength |
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Abstract |
In this study, the fire resistance performance of polymer cement mortars which are used as a representative repair material for section restoration, is evaluated and residual bond strength is measured by considering unity with concrete. According to the evaluation of fire resistance performance of re-dispersible type polymer cement mortars, residual bonding strength were drastically decreased according to heating temperatures with an increase of polymer addition rate, and this seems to be attributable to the application of polymer film, similarly with the results of SEM measurement, In addition, an explosion phenomenon occurred frequently with an increase of addition rate, so this should be considered when selecting repair materials and processing.
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