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J. Korean Ceram. Soc. > Volume 33(7); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(7): 771.
석탄회-점토계 소지의 제조 및 물성
송종택, 윤성대, 류동우, 한경섭1
단국대학교 재료공학과
1한국과학기술연구원 세라믹스연구부
Manufacture and Properties of Coal Fly Ash-Clay Body
Utilization of fly ash by-produced from coal fired power plants and classified as general waste became very important problem to solve in the environmental protection and recycling of waste materials. The possibility of large scale substitution of fly ash as a raw material for bricks and wet tiles was highly expected because the chemical compositions of fly ash were mostly Al2O3 and SiO2 and the properties of it were very similar with clay. Accordingly in order to investigate the substitutional limit these specimens were substituted from 0 to 100 wt% fly ash by 20wt% increment for clay. Fly ash-clay bodies were fired at 1200, 1250 and 130$0^{circ}C$ and then their properties were measured, It was found that these specimens sintered at 125$0^{circ}C$ had a good bending strength. Especially when these sintered bodies were added to 20, 40 and 60 wt% fly ash the bending strength of those were 201 , 205 and 191kg.cm2 respectively with the water absorption below 1%, This showed that fly ash could be substituted ab 60 wt% in this experiment.
Key words: Coal fly ash, Clay, Substitution, Bending strength, Water absorption
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