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팽창재 및 수축저감제가 강섬유보강 초고성능 시멘트 모르터의 기초적 특성과 수축저감에 미치는 영향

팽창재 및 수축저감제가 강섬유보강 초고성능 시멘트 모르터의 기초적 특성과 수축저감에 미치는 영향

저자

이현수, 박문서, 한천구, 한동엽

저널 정보

대한건축학회논문집 구조계, Vol.22, No.12, pp.97-104.

출간연도

2006

The toughness increased concrete produced by mixing steel fibers, is called Ultra High Performance Concrete (UHPC). This type of concrete, yet, is concerned about autogenous shrinkage in addition to drying shrinkage from low water-binder ratio. In this study, therefore, it is tested if the steel fiber can reduce the shrinkage of UHPC. Additionally, a test to reduce the shrinkage of UHPC using Expanding Admixture (EA) and Shrinkage Reducing Agent (SRA) is conducted. As a result, it is found that EA and SRA can reduce the shrinkage while the steel fibers lead increase of shrinkage. For EA, however, the shrinkage is increased at the initial age. Consequently, through this study, it is recommended to mix both 5% of EA and 1% of SRA for UHP mixed with 2% of steel fibers. This case will reduce drying shrinkage to 59% and autogenous shrinkage to 79% compared to the case not mixing the EA and the SRA.