Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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An Experimental Study on the Bonding Shear Performance Evaluation of the UHPC at the Construction Joint

초고성능 콘크리트 시공조인트의 전단부착성능 평가에 관한 실험적 연구

  • 장현오 (한양대학교 건축시스템공학과) ;
  • 이한승 (한양대학교 건축학부)
  • Received : 2016.10.13
  • Accepted : 2017.06.05
  • Published : 2017.06.30
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Abstract

It is necessary to involve the characteristics and quantitative surface treatment at the same time in order to retain oneness of Ultra-High-Performance Concrete(UHPC) according to construction joint occurrence. Therefore, this study derives a reasonable surface treatment method in a material's point of view through the shear adhesion performance evaluation according to the construction joints surface processing method as a part for securing the adhesion performance of the construction joints when casting UHPC. 200 MPa of required average strength was used for mix of UHPC and surface treatment method was set to totally 6 level that MN-0, AC-0, WJ-0, GR-10, GR-20, GR-30. After the specimen were manufactured to a size of $300{\times}640{\times}150mm$, Push-off test was performed to evaluate the shear adhesion strength. As a results, the bonding shear performance was increased when executing a surface treatment for the construction joint interface. As the increases in length of grooves every 10 mm, the bonding shear performance increased about 2.3 times. In this study, it is judged that 30 mm of groove length would have had an advantage for securing the monolithic of concrete. Also, the interface of cross section and the number of grooves should be considered to increasing in the bonding shear performance of concrete.

Keywords

Acknowledgement

Supported by : 국토교통과학기술진흥원

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