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초고성능 강섬유보강 시멘트 복합체의 충전슬러리 최적배합 도출

Optimum Mix Proportions of In-fill Slurry for High Performance Steel Fiber Reinforced Cementitious Composite

  • Kim, Seung-Won (Department of Civil Engineering, Kangwon National University) ;
  • Park, Cheol-Woo (Department of Civil Engineering, Kangwon National University) ;
  • Kim, Seong-Wook (Korea Institute of Construction Technology) ;
  • Cho, Hyun-Myung (Department of Civil Engineering, Kangwon National University) ;
  • Jeon, Sang-Pyo (Department of Civil Engineering, Kangwon National University) ;
  • Ju, Min-Kwan (Department of Civil Engineering, Kangwon National University)
  • 투고 : 2014.08.05
  • 심사 : 2014.09.25
  • 발행 : 2014.09.30

초록

최근 국내외 정세의 변화와 함께 예상하지 못한 테러 등의 극한의 하중의 발생가능성이 증대하고 있다. 또한 국외 건설시장의 활성화와 함께 몇몇 중동국가를 포함하여 정세가 불안정한 국가로의 진출이 잦아지고 있어 신규 또는 기존 사회기반시설 및 건축물의 물리적인 안전성이 많이 요구되고 있다. 따라서 기존의 콘크리트나 강재로는 저항이 불가한 폭발 또는 충격하중의 저항성이 건설재료로서의 중요성이 증가하고 있는 실정이다. 본 연구는 이러한 폭발 및 충격하중에 저항하기 위한 초고성능 강섬유보강 시멘트 복합체를 개발하기 위한 기초연구로서 고혼입량의 강섬유를 우선 도포하고 내부를 충전하기 위한 슬러리의 최적배합의 결정을 위한 연구이다. 이러한 고혼입량의 강섬유의 내부를 충전하기 위한 슬러리의 기초특성을 분석하고자 재료혼입을 변수로 하여 컨시스턴시, 흐름도, J-Fiber Penetration, 블리딩 및 레올로지 특성 및 역학적 특성으로 압축강도와 휨강도를 측정하였다.

As political circumstances in oversea countries and Korea varies, the risk of vulnerability from unexpected extreme loading conditions, such as explosions or extreme impacts, also increased. In addition, construction companies in Korea recently have taken chances of overseas expansion to countries where their domestic situations are not in rest. Therefore, the resistance of construction materials for blast or impact loading become taking more consideration from engineering field. This study is a part of the research to develop a high performance fiber reinforced cementitious composite materials with high volume steel fibers and primary purpose of this study is to find an optimum mix proportions of in-fill slurry. In order to accomplish the tasks this study performed experimental investigations on the slurry for consistency, compressive strength, flowability, J-penetration, bleeding and rheology properties as well as mechanical properties, compressive and flexural strength, with respect to different mix proportions.

키워드

참고문헌

  1. Jun-Ki Lee, Joon-Ho Choi, Jeong-Seob Yoon and In-Sung Cho (2010). Study on Material Segregation of Grout and Filling Characteristic of Grouting for Post-Tensioned Concrete Beam, Journal of the Korea Concrete Institute, 22(3), 419-426 [In Korean]. https://doi.org/10.4334/JKCI.2010.22.3.419
  2. Kuldeep Dager (2012). SLURRY INFILTRATED FIBROUS CONCRETE (SIFCON), International Journal of Applied Engineering and Technology, 2(2), 99-100.
  3. L. Svermova and P. J. M. Bartos (2002). Development of insitu SIFCON for connections in precast concrete and seismic resistant structures, 27th Conference on OUR WORLD IN CONCRETE & STRUCTURES, 553-559, Singapore.
  4. Pang-jo Chun, Sang Ho Lee, Sang Ho Cho and YunMook Lim (2013). Experimental Study on Blast Resistance of SIFCON, Journal of Advanced Concrete Technology, 11, 144-150, Japan. https://doi.org/10.3151/jact.11.144

피인용 문헌

  1. Flexural Performance Characteristics of High Performance Slurry Infiltrated Fiber Reinforced Cementitious Composite according to Fiber Volume Fraction vol.19, pp.4, 2015, https://doi.org/10.11112/jksmi.2015.19.4.109
  2. Fundamental properties and mechanical characteristics of high performance cement composite with steel fibres under high temperature vol.1, pp.4, 2016, https://doi.org/10.1080/24705314.2016.1240528
  3. Flexural Behavior of High-Volume Steel Fiber Cementitious Composite Externally Reinforced with Basalt FRP Sheet vol.2016, 2016, https://doi.org/10.1155/2016/2857270