Synthesis and Hydration Property of 3CaO.<TEX>${3Al_2}{O_3}$</TEX>.<TEX>$CaSO_4$</TEX> Clinker by Solid State Reaction

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J. Korean Ceram. Soc. > Volume 37(5); 2000 > Article

Journal of the Korean Ceramic Society 2000;37(5): 459.

고상반응에 의한 3CaO.${3Al_2}{O_3}$.$CaSO_4$ 클링커의 제조 및 수화

전준영, 김형철¹, 조진상¹, 송종택¹

현대시멘트 연구개발과
¹단국대학교 재료공학과

Synthesis and Hydration Property of 3CaO.${3Al_2}{O_3}$.$CaSO_4$ Clinker by Solid State Reaction

ABSTRACT

3CaO.3Al2O3.CaSO4(C4A3)clinker was prepared by solid state reaction and then its hydration property was investigated. C4A3 clinker was fired at various temperatures in the range of 700~135$0^{circ}C$. The hydration of it was studied by XRD, DSC, Solid-state 27Al MAS NMR and SEM. According to the results, the Ca4A3 clinker was produced by reacting calcium aluminates with CaSO4 and Al2O3 and C4A3 was formed as a main phase after calcining at 120$0^{circ}C$. The hydration products were mainly calcium monosulfoaluminate hydrate and Al(OH)3, and they were produced after 2hrs of hydration. However the hydration rate was about 74% at 3days.

Key words: ${C_4}{A_3}S$, Solid state reaction, Calcium monosulfoaluminate hydrate, $Al(OH)_3$