Fly ash is a by-product of coal fired electrical power plants and used as a material for cement and concrete; particularly, imported fly ash is mainly applied for cement production. Main objectives of this article are to replace domestic fly ash with an imported source. To verify the possibility of domestic fly ash as a material for cement from the aspect of chemical composition and physical properties, we manufactured various kinds of cement, such as using only natural raw material, shale, and partial replacement with domestic and imported fly ash. When we used the domestic and imported fly ash, there were no specific problems in terms of clinker synthesis or cement manufacturing in relation to the natural material, shale. In conclusion, domestic fly ash has been confirmed as an alternative raw material for cement because 7 days and 28 days compressive strength values were better than those of reference cement using natural raw material, on top of the process issue.

Abstract
1.서 론
2. 실험방법
3. 결과 및 고찰
4. 결 론
References

• 이윤철((주)에이씨엠텍) | Yoon-Cheol Lee (ACMT Inc, Yeongwol, Gangwon 26240, Republic of Korea)
• 이세용((주)에이씨엠텍) | Se-Yong Lee (ACMT Inc, Yeongwol, Gangwon 26240, Republic of Korea)
• 민경소((주)에이씨엠텍) | Kyung-So Min (ACMT Inc, Yeongwol, Gangwon 26240, Republic of Korea) Corresponding author
• 이창현(삼표시멘트) | Chang-Hyun Lee (SamPyo Cement Co. Ltd, Samcheok, Gangwon 25930, Republic of Korea)
• 박태균((재)영월산업진흥원) | Tae-Gyun Park (Yeongwol Industrial Promotion Agency, Yeongwol, Gangwon 26240, Republic of Korea)
• 유동우(군산대학교) | Dong-Woo Yoo (Kunsan National University, Gunsan, Jeonbuk, 54150, Republic of Korea)