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Mechanical Properties of Amorphous Steel Fiber Reinforced High Strength Concrete Exposed to High Temperature
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고온에 노출된 비정질 강섬유 보강 고강도 콘크리트의 역학적 특성

논문 기본 정보

Type
Academic journal
Author
Gyeong-Cheol Choe (충남대학교) Gyu-Yong Kim (충남대학교) Hong-Seop Kim (한국건설기술연구원) Eui-Chul Hwang (충남대학교) Jeong-Soo Nam (충남대학교)
Journal
Korea Concrete Institute Journal of the Korea Concrete Institute Vol.32 No.1(Wn.175) KCI Accredited Journals SCOPUS
Published
2020.2
Pages
19 - 26 (8page)
DOI
10.4334/JKCI.2020.32.1.019

Usage

cover
📌
Topic
이 연구는 고온에 노출된 비정질 강섬유 보강 고강도 콘크리트의 역학적 특성을 평가하는 것을 목표로 하며, 특히 응력-변형 관계, 압축강도, 탄성계수, 최대변형 및 열팽창변형을 조사하였다.
📖
Background
콘크리트는 고온 환경에서의 물리・화학적 변화로 인해 역학적 성능 저하가 발생할 수 있으며, 따라서 고온에 노출된 콘크리트의 역학적 특성에 대한 이해가 필요하다.
🔬
Method
압축강도가 100 및 120 MPa인 고강도 콘크리트를 사용하고, 0.0, 0.3 및 0.5 vol%의 비정질 강섬유를 혼합하여 콘크리트 시험체를 제작하였다.
🏆
Result
비정질 강섬유가 혼입된 콘크리트 시험체는 300 °C 이상의 온도에서 압축강도와 탄성계수가 상대적으로 높게 측정되었으며, 최대변형과 열팽창변형이 작게 나타났다.
Mechanical Properties of Amorphous Steel Fiber Reinforced High Strength Concrete Exposed to High Temperature
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Abstract· Keywords

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In this paper, stress-strain, compressive strength, elastic modulus and thermal expansion strain of amorphous steel fiber reinforced high strength concrete exposed to high temperatures of 100, 200, 300, 500 and 700 °C were investigated. The concrete used compressive strength 100 and 120 MPa high strength concrete, 0.0, 0.3 and 0.5 vol% amorphous steel fiber were mixed. As a result, the specimens containing amorphous steel fibers showed small peak strain and thermal expansion strain, and compressive strength and modulus of elasticity were measured relatively higher than 300 °C. Therefore, the cracks of concrete caused by the expansion of the aggregate and the shrinkage of the cement paste are controlled by the thermal expansion strain and the maximum strain due to the incorporation of the amorphous steel fiber, so that the strength and stiffness degradation phenomenon of the high-strength concrete could be improved.
#high strength concrete #amorphous steel fiber #compressive strength #elastic modulus #thermal expansion strain #고강도 콘크리트 #비정질 강섬유 #압축강도 #탄성계수 #열팽창변형

AI Summary

Topic

이 연구는 고온에 노출된 비정질 강섬유 보강 고강도 콘크리트의 역학적 특성을 평가하는 것을 목표로 하며, 특히 응력-변형 관계, 압축강도, 탄성계수, 최대변형 및 열팽창변형을 조사하였다.

Background

콘크리트는 고온 환경에서의 물리・화학적 변화로 인해 역학적 성능 저하가 발생할 수 있으며, 따라서 고온에 노출된 콘크리트의 역학적 특성에 대한 이해가 필요하다.

Method

압축강도가 100 및 120 MPa인 고강도 콘크리트를 사용하고, 0.0, 0.3 및 0.5 vol%의 비정질 강섬유를 혼합하여 콘크리트 시험체를 제작하였다.

Result

비정질 강섬유가 혼입된 콘크리트 시험체는 300 °C 이상의 온도에서 압축강도와 탄성계수가 상대적으로 높게 측정되었으며, 최대변형과 열팽창변형이 작게 나타났다.

주요내용

Contents

ABSTRACT
1. 서론
2. 실험계획 및 방법
3. 실험결과 및 고찰
4. 결론
References
요약

References (34)

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Abrams, M. S. (1971) Compressive Strength of Concrete at Temperatures to 1600F. ACI Special Publication 25, 33-58. google schola Andic-Cakır, O., and Hızal, S. (2012) Influence of Elevated Temperatures on the Mechanical Properties and Microstructure of Self Consolidating Lightweight Aggregate Concrete. Construction and Building Materials 34, 575-583. google schola Behnood, A., and Ghandehari, M. (2009) Comparison of Compressive and Splitting Tensile Strength of High-strength Concrete with and without Polypropylene Fibers Heated to High Temperatures. Fire Safety Journal 44(8), 1015-1022. google schola Chang, Y. F., Chen, Y. H., Sheu, M. S., and Yao, G. C. (2006) Residual Stress-strain Relationship for Concrete after Exposure to High Temperatures. Cement and Concrete Research 36(10), 1999-2005. google schola Chen, B., and Liu, J. (2004) Residual Strength of Hybrid-fiberreinforced High-strength Concrete after Exposure to High Temperatures. Cement and Concrete Research 34(6), 1065- 1069. google schola

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