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J. Korean Ceram. Soc. > Volume 35(11); 1998 > Article
Journal of the Korean Ceramic Society 1998;35(11): 1227.
플라이애쉬 혼합시멘트에 미치는 Na$_2$SO$_4$의 영향
정석재, 방완근, 김창은
연세대학교 세라믹공학과
The Effects of Na$_2$SO$_4$ on the Hydration of Fly ash Blended Cement
ABSTRACT
In order to prohibit the delay of early stage hydration activator Na2SO4 was added to Fly Ash blended ce-ment and its effects were investigated. Various measurements such as Compressive strength Heat of hy-dration Pore size distribution Hydration products Microstructure were evaluated and the results show that specimens of Fly Ash(50wt%) with 5% Na2SO4 dramatically improved the compressive strength because pozzolanic reaction of Fly Ash and the formation of ettringite make th microstructure denser than OPC and flyash cement paste.
Key words: Na$_2$SO$_4$, Fly ash, Pozzolanic reaction, Ettringite
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