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Title |
Mechanical Characteristics of Ultra High Strength Concrete with Steel Fiber Under Uniaxial Compressive Stress
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Authors |
최현기(Hyun-Ki Choi) ; 배백일(Baek-Il Bae) ; 최창식(Chang-Sik Choi) |
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DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.5.521 |
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Keywords |
강섬유보강 초고강도 콘크리트 ; 압축응력 ; 탄성계수 ; 최대강도시 변형률 ; 회기분석 steel fiber reinforced ultra high strength concrete ; compressive stress ; elastic modulus ; strain corresponding to peak stress ; regression analysis |
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Abstract |
Design of fiber reinforced ultra-high strength concrete members should be verified with analytical or experimental methods for safety. Members with compressive strength larger than limitation of current design code usually be designed with analytical verification using stress-strain relation of concrete and reinforcements. For this purpose, mechanical characteristics of steel fiber reinforced ultra-high strength concrete were defined under uniaxial compression. Mix proportions of test specimens were based on reactive powder concrete and straight steel fibers were mixed with different volume fraction. Compressive strength of matrix were distributed from 80 MPa to 200 MPa. Effect of fiber inclusion were investigated : increase of compressive strength of concrete, elastic modulus and strain corresponding to peak stress. For the wide range application of investigation, previously tested test specimens were collected and used for investigation and estimation equation. Based on the investigation and evaluation of previous research results and estimation equation of mechanical characteristics of concrete, regression equations were suggested.
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