수중불분리성 콘크리트의 해수침식에 대한저항성 평가

Assessment on the Seawater Attack Resistance of Antiwashout Underwater Concrete

  • 문한영 (한양대학교 토목공학과) ;
  • 김성수 (대진대학교 토목공학과) ;
  • 안태송 (한국도로공사 도로연구소 재료연구실) ;
  • 이승태 (한양대학교 대학원 토목공학과) ;
  • 김종필 (대진대학교 대학원 토목공학과)
  • 발행 : 2001.05.01

초록

In case of constructing the concrete structures under seawater environment, the concrete suffers from deterioration due to penetration of various ions such as chloride, sulfate and magnesium in seawater. Tn the present study, Immersion tests with artificial seawater were carried out to investigate the resistance to seawater attack of antiwashout underwater concrete. From the results of compressive strength, it was found that blended cement concrete due to mineral admixtures such as fly ash(FA) and ground granulated blast-furnace slag(SGC), were superior to ordinary portland cement concrete with respect to the resistance to seawater attack. Moreover, XRD analysis indicated that the formed reactants of ordinary portland cement paste by sulfate and magnesium ions led to the deterioration of concrete. As expected, however, the blended cements with FA or SGC have a good resistance to seawater attack. This paper would discuss the mechanism of seawater deterioration and benefical effects of antiwashout underwater concretes with mineral admixtures.

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