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Title |
A Study on Bond Strength of Cement-Based Filler and Flexural Strength of RC Beam Strengthened with GFRP by Filler Thickness
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Authors |
최하진 ; 최영웅 ; 박종철 ; 정시영 ; 최완철 |
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Keywords |
GRFP ; 시멘트계 충진제 ; 함수율 ; 부착력 GRFP ; Cement-based filler ; Saturation ; Bond strength |
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Abstract |
In this study, cement-based filler is used as an adhesive instead of organic adhesive, epoxy because there were problems under wet condition. First, the bond strength of cement-based filler was measured and the result was satisfied with KS F 4716. However, in case of wet condition, bond strength of epoxy adhesive decreased 0.73 N/㎟ in 7 days and 0.84 N/㎟ in 14 days from pilot test. This implies that there would be a problem on reinforced concrete structure in wet condition, such as tunnel and sewage box. In the second experiment, the flexural strength of RC beams with GFRP using different thickness of cement-based filler was investigated, and the result was indicated 113%, 66%, 75% increase in 10mm, 20mm, 30mm thickness, respectively. From the result, it was known that 10mm filler thickness produces stable bond performance.
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