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Shear Behavior of RC Beams Using Alkali Activated Slag Concrete

알칼리 활성 슬래그 콘크리트를 사용한 RC 보의 전단거동

  • Choi, Sung (Dept. of Civil & Environmental System Engineering, Sungkyunkwan Univ.) ;
  • Lee, Kwang-Myong (Dept. of Civil & Environmental System Engineering, Sungkyunkwan Univ.) ;
  • Yoo, Sung-Won (Dept. of Civil & Environmental Engineering, Woosuk Univ.)
  • 최성 (성균관대학교 건설환경시스템공학과) ;
  • 이광명 (성균관대학교 건설환경시스템공학과) ;
  • 유성원 (우석대학교 토목환경공학과)
  • Received : 2015.03.09
  • Accepted : 2015.03.25
  • Published : 2015.03.30

Abstract

Several researches on cement zero concrete using alkali-activators have been conducted to investigate its fundamental material properties such as slump, strength and durability, however, research on the structural behavior of relevant members involving the elastic modulus, stress-strain relationship is essential for the application of this cement zero concrete to structural members. In this paper the shear behavior of reinforced concrete beams using 50 MPa-alkali activated slag concrete was experimentally evaluated. To achieve such a goal, six reinforced concrete beam specimens were fabricated and their shear behaviors were observed. The maximum difference between test results and analysis results in crack shear stress for beam specimens without stirrups is 31%, while that for beam specimens with stirrup is 15%. Furthermore, it is also found that the shear strength of alkali activated slag concrete is by 22~57% greater than the nominal shear strength calculated by design code, implying that shear design equations would provide conservative results on the safety side.

현재까지 알칼리 활성화제를 사용한 무시멘트 콘크리트의 연구는 슬럼프, 강도 및 내구성 등 기본적인 재료성질에 대해서 주로 수행되어져 왔다. 그러나 알칼리 활성화제를 사용한 무시멘트 콘크리트의 구조부재에의 적용을 위해서는 탄성계수, 응력-변형률 관계 및 구조 부재 거동 등에 대한 연구가 필수적이다. 본 논문에서는 50MPa급 알칼리 활성 슬래그 콘크리트를 사용한 철근콘크리트 보시험체 6개를 제작한 후, 전단실험을 수행하였다. 실험과 해석에 의해 얻은 공칭전단강도는 전단철근이 배치되어 있는 시험체에서는 최대 18% 정도의 차이를 보이나, 전단철근이 없는 시험체에서는 최대 31% 정도의 차이를 보였으며 또한 알칼리 활성 슬래그 콘크리트의 설계전단강도에 비하여 전단강도 실험값이 22~57% 정도 크게 나타나 전단설계식이 상당히 안전측임을 알 수 있다.

Keywords

References

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Cited by

  1. Flexural and Shear Behaviors of Reinforced Alkali-Activated Slag Concrete Beams vol.2017, 2017, https://doi.org/10.1155/2017/5294290