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Title |
Hydration and Insulation Characteristics of a Ground Granulated Blast Furnace Slag Based Non-Sintered Cement Using Circulating Fluidized Bed Combustion Ash as a Activator
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Authors |
이승헌(Seung-Heun Lee) ; 이강혁(Gang-Hyuk Lee) ; 유동우(Dong-Woo Yoo) ; 하주형(Ju-Hyung Ha) ; 조윤구(Yun-Gu Cho) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.3.245 |
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Keywords |
비소성 시멘트 ; 고로슬래그 미분말 ; 순환유동층 보일러 애시 ; 알칼리 자극제 ; 열전도율 non-sintered cement ; ground granulated blast furnace slag ; circulating fluidized bed combustion ash ; alkali activator ; thermal conductivity |
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Abstract |
As people have more interest in environment-friendly structures recently, many researchers are actively researching non-sintered cement in Korea and other countries. Non-sintered cement shows various characteristics of its reaction products and hardeners, depending on the kind of alkali activators. Thus, this study manufactures ground granulated blast furnace slag based non-sintered cement binder by using circulating fluidized bed combustion ash, which is a kind of industrial byproduct, as a stimulant, and investigated its hardening characteristics and hydration, depending on the rate of circulating fluidized bed combustion ash. Besides, this study investigated its insulation property according to the weight lightening of non-sintered cement. As a result, ettringite and C-S-H were mainly formed in the hydration, and it was possible to manufacture a non-sintered cement hardener over 50 MPa. Lastly, it was possible to manufacture a non-sintered cement hardener in a thermal conductivity level of 0.127 W/m?K when the compressive strength was 10 MPa for weight lightening.
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