해양환경을 고려한 다성분계 시멘트 콘크리트의 황산염 및 동결융해 저항 특성

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 26; no. 3; pp. 26 - 32
• Main Authors: 김명식(Myung-Sik Kim), 백동일(Dong-Il Beak), 강준호(Jun-Ho Kang)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2012
• Subjects: 해양공학; Fly ash 플라이애시; Freeze-thaw attack동결융해 열화; Mata-kaolin 메타카올린; Ground granulated blast slag 고로슬래그; Sulfate attack 황산염 침식
• ISSN: 1225-0767; 2287-6715

Recently, concrete using multicomponent blended cement has been required to increase the freeze-thaw and sulfate resistances of concrete structures exposed to a marine environment. Thus, the purpose of this study was to propose the use of concrete containing multicomponent blended cement as one of the alternatives for concrete structures exposed to a marine environment. For this purpose, batches of concrete containing ordinary portland cement (OPC), binary blended cement (OPC-G, G: ground granulated blast slag), ternary blended cement (OPC-GF, F: fly ash), and quaternary blended cement (OPC-GFM, M: mata-kaolin) were made using a water-binder ratio of 50%. Then, the durability levels, including thesulfate and freeze-thaw resistances, were estimated for concrete samples containing OPC, OPC-G, OPC-GF, and OPC-GFM. It was observed from the tests that the durability levels of the concrete samples containing OPC-G and OPC-GF were found to be much better than that of the concrete containing OPC. The optimum mixing proportions were a40% replacement ratio of ground granulated blast slag for the binary blended cement and a30% replacement ratio of ground granulated blast slag and 10% fly ash for the ternary blended cement.