Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Verification of Calcium Carbonate by Cementation of Silt and Sand Using Bacteria

Bacteria를 이용한 실트와 모래의 고결화에 따른 탄산칼슘 확인

  • Received : 2011.12.01
  • Accepted : 2012.06.04
  • Published : 2012.06.29
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Abstract

The purpose of this study is to understand the mechanism of cementation of soil induced by bacteria. In order to understand the mechanism of cementation of soft soils treated with bacteria, six types of specimens(Not treated, Normal concentration bacteria treatment, High concentration bacteria treatment, Supernatant high concentration bacteria treatment, Double high concentration bacteria treatment, and 25% Specimen high concentration bacteria treatment) were made. Scanning Electron Microscope (SEM), EDX and X-ray diffraction (XRD) analyses were performed on the soft silt and loose sand specimens. Compared with the normal bacteria concentration treated specimen, a clearer cementation between particles was observed in the 25% specimen high bacteria concentration treated specimen. On the basis of the preliminary results, it appears that microbial cementation can occur in the soft soil.

본 연구의 목적은 연약지반에 대한 미생물의 고결화 메커니즘을 확인하기 위함이다. 연약지반에 대한 미생물의 고결화 메커니즘을 확인하기 위해서 6가지 미생물 조건(무처리, 일반농도처리, 고농도처리, 상층액처리, 2X 고농도처리, 25% 시료 고농도처리)으로 실험되어졌다. 전자현미경(SEM, EDX)과 X선 분석 회절기(XRD)를 이용하여 실트질시료와 느슨한 모래시료의 분석을 수행하였으며, 일반농도처리 시료에 비교하여 25% 시료 고농도처리 시료에서 입자와 입자 사이에 탄산칼슘이 더욱 명확히 관찰되어졌다. 이러한 연구결과를 바탕으로 연약지반에 대한 미생물 고결화 반응을 확인할 수 있었다.

Keywords

References

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