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Title |
Basic Research of Self Compacting Concrete Using Alkali-Activated Slag Binder
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DOI |
https://doi.org/10.4334/JKCI.2013.25.6.657 |
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Keywords |
유고로슬래그 ; 알칼리 활성 슬래그 결합재 ; 고유동성 ; 자기충전 콘크리트 blast-furnace slag ; alkali-activated slag ; fluidity ; self compacting concrete |
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Abstract |
The purpose of this study is the basic research of self-compacting concrete using Alkali-Activated Slag (AAS) binder in order to emphasize the durability of structures and facilitate casting the fresh concrete in field. The AAS binder emitted low carbon dioxide (CO2) is eco friendly material of new concept because AAS products not only emit little CO2 during production but also reuse the industrial by-products such as ground granulated blast-furnace slag (GGBS) of the steel mill. Until now, almost of domestic and foreign research are using Ordinary Portland Cement (OPC) for self-compacting concrete, and also, nonexistent research about AAS. The self-compacting concrete must get the performance of flowability, segregation resistance, filling and passing ability. Nine concrete mixes were prepared with the main parameter of unit amount of binder (400, 500, 600 kg/m3) and 3 types of water-binder (W/B) ratio. The results of test were that fresh concretes were satisfied with flowability, segregation resistance, and filling ability of JSCE. But the passing ability was not meet the criteria of EFNARC because of higher viscosity of AAS paste than OPC. This high viscosity of AAS paste enables the manufacturing of self compacting concrete, segregation of which does not occur without the using of viscosity agent. It is necessary that the development of high fluidity AAS binders of higher strength and the study of better passing ability of AAS concrete mixes in order to use self compacting AAS concrete in field.
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