Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Frost-Heaving Characteristics of Soil Mixed with Discarded Tire Powder

폐타이어 파우더 혼합토의 동상 특성

  • Kim, Hak-Sam (Dept. of Civil Engrg., Yeungnam College of Science & Technology) ;
  • Seo, Sang-Youl (Dept. of Civil Engrg., Yeungnam College of Science & Technology) ;
  • Nakamura, Dai (Dept. of Civil and Environmental Engrg., Kitami Institute of Technology) ;
  • Fukuda, Masami (International Arctic Research Center, Univ. of Alaska) ;
  • Yamashita, Satoshi (Dept. of Civil and Environmental Engrg., Kitami Institute of Technology) ;
  • Suzuki, Teruyuki (Dept. of Civil and Environmental Engrg., Kitami Institute of Technology)
  • Received : 2010.02.19
  • Accepted : 2010.04.24
  • Published : 2010.04.30
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Abstract

To determine the frost heave suppressing mechanism of soil mixed with tire powder, we conducted three kinds of laboratory experiments: measurement of unfrozen water, evaluation of thermal conductivity, and a frost heave. In this research, we focused on changes in the coefficient of permeability of the mixed soil, and first found that of the unsaturated soil. Next, in the case of the presence of ice, we took the ice-impeding factor into consideration to derive the coefficient of permeability of the frozen fringe from the area ratio of the soil and tire powder in mixed soil. The results show a positive correlation between the water intake rate and the coefficient of permeability. Moreover, we found that the frost heave decreased thanks to a reduction in the permeability and a fall in the unfrozen water content of the soil mixed with tire powder. We also calculated the weight of the water content of the soil and tire powder void quantitatively using the result of the volumetric ratio of mixed soil.

폐타이어 파우더 혼합에 따른 동상억제 메커니즘을 규명하기 위해, 부동수, 열전도율, 동상실험 등 3종류의 실내실험을 수행하였다. 본 연구에서는 폐타이어 혼합에 따른 투수계수 변화에 주목하여 먼저 마동결토의 불포화 투수계수를 계산하였고 ice-impeding factor, 혼합토내 토립자와 폐타이어 단면적을 고려하여 동결토frozen fringe내의 온도변화에 따른 투수계수 특성을 분석하였다. 그 결과 흡수속도와 투수계수 사이에는 비례관계가 존재함을 확인하였고, 동상성 저하의 주된 원인은 폐타이어 파우더 혼합에 따른 부동수분량과 투수계수의 감소임을 알 수 있었다. 또한 폐타이어 파우더 혼합토 구성성분의 체적비를 이용하여 흙과 폐타이어 간극내의 수분량을 정량적으로 산출하였다.

Keywords

References

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