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Title |
Evaluation of Flexural Performance of Eco-Friendly Alkali-Activated Slag Fiber Reinforced Concrete Beams Using Sodium Activator
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Authors |
하기주(Gee-Joo Ha) ; 이동렬(Dong-Ryul Yi) ; 하재훈(Jae-Hoon Ha) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.2.170 |
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Keywords |
알카리활성 슬래그 ; 알카리 활성화제 ; 섬유보강콘크리트 ; 휨성능 Alkali-activated slag ; Alkali activator ; Fiber reinforced concrete ; Flexural performance |
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Abstract |
In this study, it was developed eco-friendly alkali-activated slag fiber reinforced concrete using ground granulated blast furnace slag, alkali activator (water glass, sodium hydroxides), and steel fiber. Eight reinforced concrete beam using alkali-activated slag concrete were constructed and tested under monotonic loading. The major variables were mixture ratio of alkali activator, mixed/without of steel fiber. Experimental programs were carried out to improve and evaluate the flexural performance of such test specimens, such as the load-displacement, the failure mode, the maximum load carrying capacity, and ductility capacity. All the specimens were modeled in scale-down size. The reinforced concrete beams using the eco-friendly alkali-activated slag fiber reinforced concrete was failed by the flexure or flexure-shear in general. In addition, the maximum strength increased with the adding the mol of sodium hydroxide, and the specimen reinforced the steel fiber showed the value of maximum strength which is increased by 15.8% through 25.9%. It is thought that eco-friendly alkali-activated slag fiber reinforced concrete can be used with construction material and product to replace normal concrete. If there is applied to structures such as precast concrete member and production of 2nd concrete product, it could be improved the productivity and reduction of construction duration etc.
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