Geomechanics and Engineering

  • 제16권1호
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  • Pages.105-112
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Soil stabilization by ground bottom ash and red mud

  • Kim, Youngsang (Department of Civil Engineering, Chonnam National University) ;
  • Dang, My Quoc (Department of Civil Engineering, Nha Trang University) ;
  • Do, Tan Manh (Department of Civil Engineering, Hanoi University of Mining and Geology) ;
  • Lee, Joon Kyu (Department of Civil Engineering, University of Seoul)
  • 투고 : 2017.04.05
  • 심사 : 2018.07.09
  • 발행 : 2018.09.20
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents results of a compressive investigation conducted on weathered soil stabilized with ground bottom ash (GBA) and red mud (RM). The effects of water/binder ratio, RM/GBA ratio, chemical activator (NaOH and $Na_2SiO_3$) and curing time on unconfined compressive strength of stabilized soils were examined. The results show that the water/binder ratio of 1.2 is optimum ratio at which the stabilized soils have the maximum compressive strength. For 28 days of curing, the compressive strength of soils stabilized with alkali-activated GBA and RM varies between 1.5 MPa and 4.1 MPa. The addition of GBA, RM and chemical activators enhanced strength development and the rate of strength improvement was more significant at the later age than at the early age. The potential environmental impacts of stabilized soils were also assessed. The chemical property changes of leachate from stabilized soils were analyzed in terms of pH and concentrations of hazardous elements. The observation revealed that the soil mixture with ground bottom ash and red mud proved environmentally safe.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Land, Infrastructure and Transport

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