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Title |
Flexural Behavior of High Strength Reinforced Concrete Beams by Replacement Ratios of Recycled Coarse Aggregate
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Authors |
이용택 ; 홍성욱 ; 김승훈 ; 백상기 ; 조영상 |
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Keywords |
순환굵은골재 ; 치환율 ; 휨 거동 ; 고강도콘크리트 ; 보 Recycled coarse aggregate ; Replacement ratios ; Flexural behavior ; High strength concrete ; Beams |
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Abstract |
Recently, natural aggregate was adequate to supply the demand due to increase of building construction. National pollution induced by construction waste caused by the reconstruction and redevelopment was cited as the major social issues in Korea. Therefore, government are required by law to use the recycled aggregate. In order to consider safety, KS F 2573 recommend that recycled aggregate with below design strength 27MPa and replacement ratio of 30%. This study on flexural behaviors of reinforced concrete beam was conducted and the specimens employed in test were planed with high strength concrete (40, 50 and 60MPa) and recycled aggregate replacement ratio (0, 30, 50, 100%). Although the flexural strength of reinforced concrete beam has trendy to decrease with increase of replacement ratio, it is meet to KCI 2007. The comparison results show that reinforced concrete beam using recycled aggregate can apply as flexural member in building construction.
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