한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)

한국지반공학회 (Korean Geotechnical Society)
권호 표지

미생물 고결토의 공학적 특성 연구

A Study on the Properties of Microbial Cementation Soil for Engineering Applicability

  • 오종신 (전남대학교 토목공학과) ;
  • 황성원 (전남대학교 토목공학과) ;
  • 강희복 (한영대학교 토목공학과) ;
  • 강권수 (서남대학교 토목공학과) ;
  • 김종렬 (전남대학교 토목공학과)
  • Oh, Jong-Shin (Dept. of Civil Engineering, Chonnam National University) ;
  • Hwang, Soung-Won (Dept. of Civil Engineering, Chonnam National University) ;
  • Kang, Hee-Bog (Dept. of Civil Engineering, Hanyeong University) ;
  • Kang, Keon-Soo (Dept. of Civil Engineering, Seonam University) ;
  • Kim, Jong-Ryeol (Dept. of Civil Engineering, Chonnam National University)
  • 발행 : 2008.03.28
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초록

The purpose of this study was to investigate the feasibility of using sedimentation calcium carbonate production based on microorganism activities in the strength manifestation of various soil conditions including ground. For analysis and comparison of microbial cementation soil's strength, unconfined compression test was executed by each content of soil(S), water(W), microorganism(B), microorganism and deposit (BF), microorganism, admixture and deposit(BCF) at specimen. The result, the strength of SB(soil+microorganism) and SBF(soil+microorganism+deposit) increased about 8%, 15% than SW(soil+water). Also, initial strength increased. But the strength of SBC(soil+microorganism+admixture) and SBCF(soil+microorganism+deposit+admixture) increased about 71%, 115% than SW(soil+water). The results of the SEM analysis, leading to the formation of an adhesive substance layers at the surface and resulting in firm particle configuration. The XRD examination of the sediment resulting from the reaction between the microorganism and the deposit control agent confirmed the presence of a type of calcium carbonate ($CaCo_3$) vaterite, which affects soil strength formation, as well as sodium silicate, silicides and so forth. This indicates that microorganism plays an important role in the production of carbonate ($CaCo_3$), sodium silicate and silicides. It affects to revelation of ground strength.

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