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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.72 No.3
- 발행연도
- 2019.1
- 수록면
- 339 - 354 (16page)
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초록· 키워드
오류제보하기
Reusing building materials and concrete of old buildings can be a promising strategy for sustained development. In buildings, the performance of materials under elevated temperatures is of particular interest for determining fire resistance. In this study, the effect of pozzolan and aggregate type on properties of concrete exposed to fire was investigated. In doing so, nanosilica with cement-replacement levels of 0, 2, and 4% as well as silica fume and ultrafine fly ash with cement-replacement levels of 0, 7.5, and 15% were used to study effect of pozzolan type, and recycled refractory brick (RRB) fine aggregate replacing natural fine aggregate by 0 and 100% was utilized to explore effect of aggregate type. A total of 126 cubic concrete specimens were manufactured and then investigated in terms of compressive strength, ultrasonic pulse velocity, and weight loss at 23°C and immediately after exposure to 400 and 800°C. Results show that replacing 100% of natural fine aggregate with recycled refectory brick fine aggregate in the concretes exposed to heat was desirable, in that it led to a mean compressive strength increase of above 25% at 800°C. In general, among the pozzolans used here, silica fume demonstrated the best performance in terms of retaining the compressive strength of heated concretes. The higher replacement level of silica fume and ultrafine fly ash pozzolans in the mixes containing RRB fine aggregate led to a greater weight loss rate, while the higher replacement level of nanosilica reduced the weight loss rate.
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참고문헌 (44)
참고문헌 신청
2004 / ACI 228.2R-98, Nondestructive test methods for evaluation of concrete in structures / American Concrete Institute
1989 / ACI Committee 216, Guide for determining the fire endurance of concrete elements (ACI 216R-89) / American Concrete Institute
C. Albano / 2009 / Influence of content and particle size of waste pet bottles on concrete behavior at different w/c ratios / Waste Management 29(10):2707~2716
Omer Arioz / 2007 / Effects of elevated temperatures on properties of concrete / Fire Safety Journal 42(8):516~522
2002 / ASTM C192/C192M, Standard practice for making and curing concrete test specimens in the laboratory / American Society for Testing and Materials
1989 / ACI Committee 216, Guide for determining the fire endurance of concrete elements (ACI 216R-89) / American Concrete Institute
C. Albano / 2009 / Influence of content and particle size of waste pet bottles on concrete behavior at different w/c ratios / Waste Management 29(10):2707~2716
Omer Arioz / 2007 / Effects of elevated temperatures on properties of concrete / Fire Safety Journal 42(8):516~522
2002 / ASTM C192/C192M, Standard practice for making and curing concrete test specimens in the laboratory / American Society for Testing and Materials
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