CSA를 사용한 플라이애시 시멘트 수화물의 공극 특성에 관한 연구

다국어 초록 (Multilingual Abstract)

Fly ash used as an admixture material in cement has been applied to mass concrete amongst others for reduction of hydration heat and regarded by the cement industry as an essential material in concrete manufacture that reduces greenhouse gas emission and has a cost-saving effect. However, the downside of using fly ash is that it reduces the initial strength of concrete and resistance to neutralization.
In this study, it was examined whether addition of calcium sulfoaluminate (CSA) could improve the initial strength of concrete and the micropore structure as a means to ameliorate the reduced initial strength and neutralization resistance caused by increased porosity resulting from the use of fly ash. Up to 30% of cement was substituted with fly ash, while the amount of CSA substitution was 8% of the fly ash weight.
The results of the experiment showed that increasing the amount of fly ash resulted in an increase in the distribution of pores with a diameter of more than 0.1㎛. In particular, 30% substitution resulted in higher porosity distribution in the 20㎚~0.1㎛ and over 1㎛ distribution ranges compared to cement. On the other hand, adding CSA in an amount equivalent to 8% of the fly ash weight resulted in the pores having an average particle diameter of 0.18㎛ with a relatively low distribution of pores that are larger than 0.5㎛. Based on this result, it was determined that the use of CSA would enhance the initial strength and neutralization resistance.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 이론적 배경
• 3. 실험계획 및 방법
• 4. 실험결과
• 5. 결론
• 참고문헌

참고문헌 (Reference)

1 김영진, "요업공학핸드북" 일본요업학회 1642-, 1990

2 장복기, "시멘트 재료화학" 전남대학교 출판부 1998

3 內川浩, "混合セメントの水和および構造形成に及ぱす混合材の效果" セメント協會 1987

4 高橋茂, "水和反應生成物と硬化組織" ヒメント協會,ヒメント科學 46-52,

5 황광률, "フライアッシュを大量混和したコンクリ.トの基礎性狀に關する硏究" 동경대 1999

6 大門正機, "フィラ.ヒメント"

7 이진용, "Na2SO4가 시멘트-플라이애시 페이스트 및 콘크리트 강도에 미치는 영향" 11 (11): 85-94, 1999