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Title |
Feasibility Study on the Use of CFBC Ash as Non-sintered Binder
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Authors |
강용학(Yong Hak Kang) ; 임귀환(Gwi Hwan Lim) ; 김상준(Sang Jun Kim) ; 최영철(Young Cheol Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.5.119 |
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Keywords |
건설재료 ; 비소성 ; 결합재 ; 순환유동층 보일러애시 Construction Material ; Non-sintered ; Binder ; CFBC ash |
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Abstract |
Recently, the production of circulating fluidized bed combustion ash has been increased in thermal power plants. The addition of limestone for the desulfurizing effect of circulating fluidized bed boiler ash increases the content of CaO and SO3 contained in ash, which is higher than the free fly ash in general fly ash. Unlike conventional fly ash, the circulating fluidized bed combustion ash has a high reactivity when it comes into contact with water due to its hydraulic properties and high free-CaO content. The aim of this study is to investigate the possibility of non-sintered binder by using self-cementing properties of circulating fluidized bed combustion ash. The mechanical and hydration characteristics were investigated according to the content of CFBC ash. In addition, the effects of gymsum type and content on the compressive strength and micro-structure of non-sintered binder pastes.
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