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Journal of the Korean Ceramic Society 1994;31(10): 1231. |
| 졸겔법에 의한 $CaO-P_2O_5-SiO_2$계 미세분말의 수화 및 강도특성 |
| 이형우, 김정환 |
| 한일시멘트 대전연구소 |
| Properties of Hydration and Strength of Sol-gol Derived Fine Particle in the System $CaO-P_2O_5-SiO_2$ |
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| ABSTRACT |
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In this study, gel powder which had relatively high hydration reactivity in CaO and P2O5 rich composition of CaO-P2O5-SiO2-H2O system was prepared by sol-gel process and its hydrated specimen was manufactured. The it was investigated to appropriate calcination temperature in sol-gel process which hydrated specimen of gel powder have proven to strength and the effect of factors influenced strength in hydration process. The major product of before and after hydration reaction was hydroxyapatite, and crystalline phase of C-S-H was already formed during gelation process. After hydration reaction of pressed specimen, crystalline phase of C-S-P-H was formed. It was hydrated product of silicocarnotite (5CaO.P2O5.SiO2). Gel phases of C-S-H and C-S-P-H occured as a result of partial substitution of amorphous silica by P2O5 was formed. The strength of hydrated hardened body is developed by strong bonding and bridging between the gel phases of C-S-H or C-S-P-H and the crystalline products such as hydroxyapatite, Ca(OH)2 C-S-H and C-S-P-H. In addition, the ultrafine gel powder have an great effect on increase of hydration reaction. |
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