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Journal of the Korean Ceramic Society 2000;37(6): 576. |
| 팽창재를 포함한 시멘트 모르터의 팽창 요인 |
| 황인동, 염희남1, 정윤중2 |
(주)세일콘 부설연구소
1기술표준원 무기화학과
2명지대학교 무기재료공학과 |
| Expansion Factors of Cement Mortar Containing Expanding Admixture |
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| ABSTRACT |
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Two type of expanding cement generally referred to as CSA with Hauyne(3CaO 3Al2O3 CaSO4) and Quick lime(CaO). Hauyne is formed to ettringite when there are presented with CaO and CaSO4, and CaO reacts wtih water to form Ca(OH)2. REcently, the mechanism of compensation and expand mortar or concrete tend to same and it has been used improving on its shrink property. The volume of cement paste varies with its water content shrink with drying and re-wetting. Concrete and mortar works are required shrinking compensation and expansion properties to reduce of potential crack. The use of expansion cement may improve on its shrinking volume changes. CSA dosages for shrinking compensation limited by cement weight, but obtained difference expansion rate with varied W/C or inorganic admixture. This paper studies expansion rate according to expansion cement dosages, water and inorganic admixtures as Silica fume. Therefor, the expansion factor has to considered before the application. |
| Key words:
Expansion admixture, Ettringite, Expansion factor, Expansion rate |
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