• 월간 기계설비
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• s.20
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• pp.72-73
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• 1991

[ $\ulcorner$ ]하나로 파이프 모듈$\lrcorner$시스템은 급$\cdot$배수용 파이프와 냉$\cdot$난방용 파이프, 주방 및 화장실 배기용 스파이럴 덕트를 한데 모아 관주위에 폴리우레탄으로 둘러싼 후 집섬보드로 마감처리까지 끝낸 팩케이지형 시스템을 공장에서 생산, 현장에서는 조립$\cdot$시공만 하면 되는 시스템이다.

• Journal of the Korea Institute of Building Construction
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• v.3 no.4
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• pp.111-117
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• 2003

Recently SAMWOO EMC received order and built interior walls which was used the day process in several high-rise compound buildings. On the way to build, this process was brought about several matter according to the progress and qualify control. So, this study is the improving way of the dry process from experiences on those constructions

• Journal of the Korea Concrete Institute
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• v.21 no.1
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• pp.21-27
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• 2009

In this study, experimental findings on the resistance to magnesium sulfate attack of portland cement mortar and paste specimens incorporating metakaolin (MK) are presented. Specimens with four replacement levels of metakaolin (0, 5, 10 and 15% of cement by mass) were exposed to solutions with concentrations of 0.424% and 4.24% as $MgSO_4$ at ambient temperature. The resistance of mortar specimens was evaluated through visual examination and linear expansion measurements. Additionally, in order to identify the products formed by magnesium sulfate attack, microstructural analyses such as XRD, DSC and SEM/EDS were also performed on the paste samples incorporating metakaolin. Results confirmed that mortar specimens with a high replacement level of metakaolin exhibited lower resistance to a higher concentration of magnesium sulfate solution. It was found that the negative effect of metakaolin on the magnesium sulfate attack is partially attributed to the formation of gypsum and thaumasite. Conclusively, it is necessary to pay a special attention when using metakaolin in concrete structures, particularly under highly concentrated magnesium sulfate environment.