• Title/Summary/Keyword: 시멘트 콘크리트

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Case Study on the Mixing Proportions of 100 Year Life Time Concrete (내구수명 100년 해양 콘크리트의 배합사례)

  • Jang, Bong-Seok;Ahn, Jeong-Hwan
    • Proceedings of the Korea Concrete Institute Conference
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    • 2008.04a
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    • pp.1073-1076
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    • 2008
  • This study shows some results of concrete mixing design has 100 years life time. The ratios of ternary blended cement are 4 types. the ratios of blast furnace slag cement are 3 types. In this case study, 40%, 50% and 60% replacement ratio of blast furnace slag(BSF) to OPC are used, also 35:45:20, 30:35:35, 30:40:30 and 35:40:25 ratio of OPC:BSF:FA are used. The mixing design tests include slump, air content, compressive strength and thermal properties of concrete. The compressive strength tests are executed at the age of 3, 7, 28, 56, and 91 days. The coefficient of chloride diffusion is determined by NT Build 492 method. The purpose of this study is to shows the results of case studies as the ratio of blended cement varies.

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Drying Shrinkage and Cracking Resisting Performance of Eco-cement Concrete mixing Fly-ash (플라이 애쉬를 혼입한 에코시멘트 콘크리트의 건조수축 및 균열저항 특성)

  • Yoo, Kwan-Jong;Seo, Tae-Seok;Choi, Chang-Sik
    • Proceedings of the Korea Concrete Institute Conference
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    • 2009.05a
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    • pp.409-410
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    • 2009
  • The eco-cement concrete using fly-ash was produced for the improvement of the compressive strength of the eco-cement concrete under the long term age, and compressive strength test, drying shrinkage test, uniaxial restraint shrinkage cracking test, and bond test were carried out. In this study, the cracking resistance performance was investigated.

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An Experimental Study on the Hydration and Mechanical Properties of High Strength Concrete with High Calcium Sulfate Cement (고황산염시멘트를 이용한 고강도콘크리트의 수화 및 역학적 특성에 관한 실험적 연구)

  • 박승범;임창덕
    • Magazine of the Korea Concrete Institute
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    • v.5 no.1
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    • pp.129-138
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    • 1993
  • 프리텐션 방식 원심력 고강도 콘크리트 말뚝[KS F 4306]제조에 관한 실험적 연구로써 고황산염시멘트를 이용한 800kg/$ extrm{cm}^2$이상의 고강도콘크리트 제조시 수화 특성검토와 콘크르트 조직내의 기공율과 압축강도간의 상관식을 도출하여 고강도 발현기구를 규명하였으며 콘크리트 압축 및 휨강도간의 상관식 유도와 내구성 측면에서의 내동해성, 건조수축, 화학저항성등을 보통 포틀랜드 시멘트와 비교 고찰한 결과, 고황상염시멘트의 내구성이 우수함을 확인하였다.