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Research Article

Development of Reinforcement Grout Materials Using Reinforcing Fiber and Blast Furnace Slag Powder

보강섬유와 고로슬래그 미분말 함유량에 따른 차수그라우트재 개발

Hyeok Seo1
,
Daehyeon Kim2*
서 혁1
,
김 대현2*
1Member, Graduate Student, Department of Civil Engineering, Chosun Univ., 309 Pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
2Member, Professor, Department of Civil Engineering, Chosun Univ., 309 Pilmun-daero, Dong-gu, Gwangju 61452, Republic of Korea
* Corresponding Author
30 September 2019. pp. 101-112
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Abstract

그라우팅 공법은 연약지반의 보강과 방수, 부등침하로 손상된 구조물의 지지력을 향상시킨다. 본 연구는 보강섬유와 고로슬래그 미분말을 이용하여 그라우트재의 압축강도와 차수를 향상시키는데 있다. 이와 관련하여 본 연구에서는 고로슬래그 미분말의 비율이 높은(50% 이상) 시료에 대해 일축압축시험을 수행하였다. Mpa또한 탄소섬유와 아라미드 섬유를 비교하기 위하여 0, 0.5, 1.0%로 증가시켜 실험하였다. 탄소섬유 및 아라미드 섬유 함유량이 증가함에 따라 일축압축강도가 증가하였고 이는 그라우트재 내에 섬유에 의한 가교작용이 일축압축강도를 증가시키는 경향을 확인하였다. 또한 아라미드 섬유로 보강된 그라우트재에서 탄소섬유로 보강된 그라우트재 보다 일축압축강도가 약 10%이상 증가된 것을 확인하였다.

The grouting method is utilized to reinforce and waterproof poor grounds, enhance the bearing capacity of geo-structures damaged from differential settlement. The purpose of this research is to improve the compressive strength and degree of grout using reinforcing fibers and blast furnace slag powder. In this regard, this study has conducted uniaxial compression tests for the specimens with high ratios (higher than 50%) of blast furnace slag powder. The carbon fiber content was increased by 0, 0.5, and 1.0% to coMpare its compressive strength with that of aramid fiber. The uniaxial compressive strength increased with the increase of fiber content and the bridging activity by fiber in cement tended to increase uniaxial compressive strength. Based on the results, it was confirmed that the aramid fiber has a gel time of 14 seconds and the uniaxial compressive strength is more than 3 Mpa coMpared to carbon fiber.

Keywords
Blast furance slag
Aramid fiber
Carbon fiber
Uniaxial compressive strength
Gel-time

References
1
Choi, S. G. (2013), Development of environment-friendly sand cementation using blast furnace slag and calcite precipitation, Kyungpook National University, Doctor Thesis.
2
Han, C. G., Kim S. H. and Son, H. J. (2009), Engineering Characteristics Analysis of High Strength Concrete Followed in replacement ratio increase in Blast Furnace Slag, Journal of the Korean Recycled Construction Resources Institute, 7, pp.62-68.
3
Jang, H. O. and Ji, N. O. (2013), An Experimental Study on the Mixing of Strength and High Fluidity Concrete Using Ground Granulated Blast Furnace Slag, Journal of the Architectural Institute of Korea, 29(6), pp.81-88.
4
Jeong, J. Y., Jang, S. Y., Choi, Y. C., Jung, S. H. and Kim, S. I. (2015), Effects of Replacement Ratio and Fineness of GGBFS on the Hydration and Pozzolanic Reaction of High-Strength High-Volume GGBFS Blended Cement Pastes, Journal of the Korea Concrete Institute, 27(2), pp.115-125.
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7
Kim, J. H., Han, M. C. and Han, C. G. (2014), Strength Development of the Concrete Incorporating Blast Furnace Slag and Recycled Aggregate as Alkali Activator, Journal of the Korean Recycled Construction Resources Institute, 2(2), pp.107-114.
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8
Kim, Y. H., Han, C. G. and Lee, H. J. (2013), Effect of Recycled Fine Aggregate Powder and OPC on the Strength Gain Properties of Mortar Using Blast Furnace Slag Powder and Natural Aggregates, Journal of the Architectural Institute of Korea, 29(3), pp.81-88.
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Yang, Y. H. (2017), Evaluation of Reinforcement Effect of Grouting using Aramid Fiber, Chosun University, Master Thesis.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 18
  • No :3
  • Pages :101-112
  • Received Date : 2019-06-09
  • Revised Date : 2019-09-24
  • Accepted Date : 2019-09-25
  • DOI :https://doi.org/10.12814/jkgss.2019.18.3.101
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