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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.1
- 수록면
- 35 - 42 (8page)
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초록· 키워드
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When reinforced concrete is subjected to high temperatures, compressive strength and elastic modulus of concrete, ductility and yield stress of steel decrease. Degradation of these properties after such an exposure may result in undesirable structural failures and are great importance in terms of the serviceability of buildings. Therefore, changes in material's properties have to be evaluated in decide whether the buildings exposed to high temperature effect will be repaired or demolished.
Assessment of fire damaged concrete usually starts with visual observation of color change, crazing, cracking, and spalling. On heating, a change in color from normal to a pink/red is often observed and this is useful since it coincides with the onset of significant loss of concrete strength.
The purpose of this study is to quantify changes in color for concrete using spectrophotometric method and to identify the relationship between color change and residual compressive strength loss of concrete as temperature increases.
For this purpose, we manufactured concrete samples with varying water-to-cement ratios and heated them to target temperatures of 100, 200, 300, 400, 500, 600, 700 and 800℃ in an electric oven, whereupon their color changes and residual compressive strengths were measured for analysis. The result of the study shows that color change and residual compressive strength in a concrete structure exposed to high temperature have a consistent relationship in quantitative equation, therefore, it may be possible to know how much compressive strength of the concrete reduces by measuring color changes and estimating heating temperature.
Assessment of fire damaged concrete usually starts with visual observation of color change, crazing, cracking, and spalling. On heating, a change in color from normal to a pink/red is often observed and this is useful since it coincides with the onset of significant loss of concrete strength.
The purpose of this study is to quantify changes in color for concrete using spectrophotometric method and to identify the relationship between color change and residual compressive strength loss of concrete as temperature increases.
For this purpose, we manufactured concrete samples with varying water-to-cement ratios and heated them to target temperatures of 100, 200, 300, 400, 500, 600, 700 and 800℃ in an electric oven, whereupon their color changes and residual compressive strengths were measured for analysis. The result of the study shows that color change and residual compressive strength in a concrete structure exposed to high temperature have a consistent relationship in quantitative equation, therefore, it may be possible to know how much compressive strength of the concrete reduces by measuring color changes and estimating heating temperature.
목차
Abstract
1. 서론
2. 색조분석의 기본 이론
3. 실험계획
4. 실험결과 및 분석
5. 결론
참고문헌
참고문헌 (15)
참고문헌 신청
한국콘크리트학회 / 2005 / 철근콘크리트 구조물의 내화특성
B. Georgali / 2005 / Microstructure of fire-damaged concrete / Cement & Concrete Composites 27
Deng-Fong Lin / 2004 / Assessment of fire-damaged mortar using digital image process / Journal of materials in civil engineering 16(4)
G. A. Khoury / 1992 / Compressive strength of concrete at high temperatures: a reassessment / Magazine of concrete research 44(161)
J. R. dos Santos / 2002 / Assessment of concrete structures subjected to fire / Mag. of concrete research 54(3)
B. Georgali / 2005 / Microstructure of fire-damaged concrete / Cement & Concrete Composites 27
Deng-Fong Lin / 2004 / Assessment of fire-damaged mortar using digital image process / Journal of materials in civil engineering 16(4)
G. A. Khoury / 1992 / Compressive strength of concrete at high temperatures: a reassessment / Magazine of concrete research 44(161)
J. R. dos Santos / 2002 / Assessment of concrete structures subjected to fire / Mag. of concrete research 54(3)
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UCI(KEPA) : I410-ECN-0101-2012-540-004014131