Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Solidification of Sandy Soils using Cementation Mechanism of Microbial Activity

미생물활성에 의한 시멘테이션 작용을 이용한 모래지반의 안정화

  • Kim, Ki-Wook (Graduate School, Gyeongsang National Univ.) ;
  • Yun, Sung-Wook (Institute of Agri. & Life Sci. Gyeongsang National Univ.) ;
  • Chung, Eu-Jin (Plant&Biotech. Research Center, Division of Applied Life Sci. (BK21 Plus), Gyeongsang National Univ.) ;
  • Chung, Young-Ryun (Plant&Biotech. Research Center, Division of Applied Life Sci. (BK21 Plus), Gyeongsang National Univ.) ;
  • Yu, Chan (Department of Agricultural Eng.(Inst. of Agri & Life Sci.), Gyeongsang National Univ.)
  • Received : 2014.10.13
  • Accepted : 2014.11.24
  • Published : 2014.11.30
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Abstract

To evaluate bio-cementation of microbial on sands, laboratory test was conducted using acrylic cubic molding boxes ($5cm{\times}5cm{\times}5cm$). It was incubated the microbial, called Bacillus Pasteurii, according to Park et al (2011, 2012). and applied 50ml each specimen. Two type of sand samples used were Jumoonjin sand and common sand (well graded). These sands were molded in acrylic boxes with the relative density of 30 % and 60 % respectively. Microbial were poured onto the samples molded in acrylic boxes and cured at the room temperature and humidity. After 7, 14 and 21days, it was measured the compressive strength, pH, EC, and density and it were observed SEM and XRD to verify the effect of bio-cementation. It was found that bio-cementation was increased a strength of sands and it was appeared that strengths were related to the type of sand and relative density. Therefore it was confirmed the solidification of sands using the bio-cementation by microbial activation and the usefullness of acrylic molding boxes when tests were conducted on the soil of sands.

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References

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