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Title |
Permeability Evaluation of OPC and GGBFS Concrete with Cold Joint
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Authors |
최세진(Se-Jin, Choi) ; 김성준(Seong-Jun, Kim) ; 문진만(Jin-Man, Moon) ; 권성준(Seung-Jun, Kwon) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.4.435 |
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Keywords |
투수성 ; 콜드조인트 ; 고로슬래그 미분말 ; 다공성 매체 ; 내구성 permeability ; cold joint ; GGBFS ; porous media ; durability |
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Abstract |
Concrete, as a porous media, has permeability and it is considered as a major parameter for durability evaluation. Cold joint caused by delayed placing of concrete accelerates water permeation and intrusion of harmful ions. In the paper, concrete specimens containing GGBFS (Ground Granulated Blast Furnace Slag) and OPC (Ordinary Portland Cement) are prepared with cold joint section, and water permeability and water flow at the age of 91 days are measured for 2 weeks. Sound concrete with GGBFS shows decreased permeability to 89% for sound concrete with OPC and 0.86 of decreasing ratio is evaluated in GGBFS concrete with cold joint. Through WPT (Water Penetration Test), the effects of mineral admixture and cold joint on water permeability are evaluated, and variation in water behavior via cold joint is analyzed through probabilistic method as well.
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