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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.11 No.1
- 발행연도
- 2017.3
- 수록면
- 17 - 28 (12page)
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초록· 키워드
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Although concrete is a noncombustible material, high temperatures such as those experienced during a fire have a negative effect on the mechanical properties. This paper studies the effect of elevated temperatures on the mechanical properties of limestone, quartzite and granite concrete. Samples from three different concrete mixes with limestone, quartzite and granite coarse aggregates were prepared. The test samples were subjected to temperatures ranging from 25 to 650 ℃ for a duration of 2 h. Mechanical properties of concrete including the compressive and tensile strength, modulus of elasticity, and ultimate strain in compression were obtained. Effects of temperature on resistance to degradation, thermal expansion and phase compositions of the aggregates were investigated. The results indicated that the mechanical properties of concrete are largely affected from elevated temperatures and the type of coarse aggregate used. The compressive and split tensile strength, and modulus of elasticity decreased with increasing temperature, while the ultimate strain in compression increased. Concrete made of granite coarse aggregate showed higher mechanical properties at all temperatures, followed by quartzite and limestone concretes. In addition to decomposition of cement paste, the imparity in thermal expansion behavior between cement paste and aggregates, and degradation and phase decomposition (and/or transition) of aggregates under high temperature were considered as main factors impacting the mechanical properties of concrete. The novelty of this research stems from the fact that three different aggregate types are comparatively evaluated, mechanisms are systemically analyzed, and empirical relationships are established to predict the residual compressive and tensile strength, elastic modulus, and ultimate compressive strain for concretes subjected to high temperatures.
목차
Abstract
1. Introduction
2. Experimental Program
3. Results and Discussion
4. Conclusions
References
참고문헌 (46)
참고문헌 신청
Abrams, M. S. (1971). Compressive strength of concrete at temperatures to 1600F. ACI Special Publication, 25, 33?58.
ACI. (2014). Building code requirements for structural concrete (ACI 318-14) and commentary (ACI 318-14R). American Concrete Institute (ACI): Farmington Hills, MI.
Akhavan, A. C. (2005). The quartz page. Retrieved 07/24, 2016. http://www.quartzpage.de/gen_mod.html.
Ali, F., Nadjai, A., Silcock, G., & Abu-Tair, A. (2004). Outcomes of a major research on fire resistance of concrete columns. Fire Safety Journal, 39(6), 433?445.
Arioz, O. (2007). Effects of elevated temperatures on properties of concrete. Fire Safety Journal, 42(8), 516?522.
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UCI(KEPA) : I410-ECN-0101-2017-532-002243707