A Controlled Low-Strength Materials (CLSM) is suitable for mine backfilling because it does not require compaction owing to it high fluidity and can be installed quickly. Therefore, a CLSM utilizing CO2-solidified Circulating Fluidzed Bed Combustion (CFBC) coal ash was developed and it’s properties were investigated, since. CO2-solidification of CFBC coal ash can inhibit exudation of heavy metals. The chemical composition and specific surface area of Pulverized coal Combustion fly ash and CFBC fly ash were analyzed. The water ratio, compressive strength and length change ratio of CLSM were confirmed. The water ratios differed with the specific surface area of the CLSM. It was confirmed that the porosity of CLSM affected its compressive strength and length change ratio.

Abstract
 1. 서 론
 2. 실험재료 및 방법
  2.1. 실험 재료
  2.2. 실험 방법
  2.3. 분석방법
 3. 결과 및 토론
  3.1. CFBC석탄재 및 PC석탄재의 특성
  3.2. CFBC석탄재의 CO2 고정화 특성
  3.3. CLSM의 물 비율
  3.4. 압축강도 특성
  3.5. 길이변화 특성
 4. 결 론
 REFERENCES

• 조용광(한일시멘트 테크니컬센터) | Yong-Kwang Cho (Technical Center, HANIL CEMENT Co.Ltd.)
• 남성영(한일시멘트 테크니컬센터) | Seong-Young Nam (Technical Center, HANIL CEMENT Co.Ltd.)
• 이용무(한일시멘트 테크니컬센터) | Yong-Mu Lee (Technical Center, HANIL CEMENT Co.Ltd.)
• 김춘식(한일시멘트 테크니컬센터) | Chun-Sik Kim (Technical Center, HANIL CEMENT Co.Ltd.)
• 서신석(한일시멘트 테크니컬센터) | Shin-Seok Seo (Technical Center, HANIL CEMENT Co.Ltd.)
• 조성현(한일시멘트 테크니컬센터) | Sung-Hyun Jo (Technical Center, HANIL CEMENT Co.Ltd.)
• 이형우(한일시멘트 테크니컬센터) | Hyoung-Woo Lee (Technical Center, HANIL CEMENT Co.Ltd.)
• 안지환(한국지질자원연구원 탄소광물화사업단) | Ji-Whan Ahn (Center for Carbon Mineralization, Korea Institute of Geosceinces and Mineral Resources (KIGAM)) Corresponding author