팽창 콘크리트에 대한 PPT 발표자료(영어)
- 최초 등록일
- 2008.06.05
- 최종 저작일
- 2008.06
- 10페이지/
MS 파워포인트
- 가격 1,000원
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소개글
피피티 발표 자료입니다.
팽창 콘크리트에 대해 영어로 발표한 것입니다.
목차
■ Definition
■ Properties of Expansion concrete
■ Types of Expansion concrete
■ Types of Expansion ash
■ Mix design of Expansion concrete
■ Applications of Expansion concrete
■ Reference
본문내용
Definition
1) Expansion concrete is the concrete that mixed with expansion ash.
2) Concrete has an expansive force within approximately 1 week since hardening has been started.
Types of expansion concrete
Type 1. Concrete that compensates for drying shrinkage.
- A main purpose is to decrease cracks by dry contraction.
Type 2. Chemical prestressed concrete
- It should have more expansive force than Type 1.
Properties of expansion concrete
- It can reduce a cracking by drying shrinkage according to expansion effects.
- As tensile strength is improved, it is effective in the structure that durability is required.
Types of expansion ash
There are four types of expansion ash that is used in order to make expansion concrete.
1) Type K
Type K compose with Calcium sulfoaluminate, CaSO₄ and CaO, and when it reacts with water, it expands with making ettringite.
2) Type S
It is a mixture of 3CaO·Al₂O₃and gypsum. If Type S mixes with water, it creates ettringite like Type K.
3) Type M
참고 자료
1) 정재동 외, "특수 콘크리트", 콘크리트 학회, p137~147
2) www.google.co.kr
3) http://blog.daum.net/mapae33/833610
4) "콘크리트 시방서", 건설교통부