Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지
DOI QR코드

DOI QR Code

Application of Paper Sludge Ash-Stabilized Soft Ground for Subgrade Soil

제지애쉬 고화제로 안정처리된 연약지반의 도로노상토 적용에 관한 연구

  • Shin, Eunchul (Department of Civil and Environmental Engineering, College of Urban Science, Incheon National University) ;
  • Park, Sooyoung (Department of Civil and Environmental Engineering, College of Urban Science, Incheon National University)
  • Received : 2018.05.10
  • Accepted : 2018.05.29
  • Published : 2018.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

The southwestern part of Korean Peninsula, which length is about 13,000 km, is largely formed with soft cohesive soil ground and when it is developed, the low bearing capacity and excessive settlement of soft ground give many problems. In particular, a lot of clayey soil is deserted due to high moisture content and weakness, and areas formed with soft ground. In this study it was performed unconfined compression test, CBR tests, laboratory frost heaving test, and wheel tracking test in order to determine the optimum mixture ratio of paper sludge ash added chemical stabilizer with soft soil for consideration of its frost heaving and strength characteristics. As a results of the above experiments, when the soft soil is mixed with 6% of chemical stabilizer to improve the soft soil for utilizing as a subgrade soil material. It is satisfied the quality standard of fill materials, and the results of this research are expected to be used as an appropriate usage standard for utilization of on-site soil generated.

해성점토가 주를 이루고 있는 연안지역에서는 높은 함수비와 많은 세립토 함유로 매립 및 투기도 많은 어려움이 따르고 있고 시공에 있어 성토재의 부족이라는 또 다른 문제에 직면하고 있는 실정이다. 본 연구에서는 제지애쉬 첨가 고화제를 혼합한 현장발생 유용토의 동상특성이나 강도특성을 고려한 배합비를 결정하기 위해 혼합토의 광물학적 분석은 물론 배합비에 따른 강성의 변화를 분석하기 위한 일축압축강도실험을 수행하였다. 또한 현장발생토의 고화처리 효과를 검증하고 노상재로의 활용성을 평가하기 위해 동상시험과 휠트래킹시험을 수행하였다. 그 결과, 제지애쉬 첨가 고화제를 6% 혼합할 경우 전반적으로 흙쌓기 재료의 품질기준을 만족하는 것으로 나타났으며 본 연구 결과가 현장발생토의 활용에 대한 적합한 사용기준으로 활용할 수 있을 것으로 기대된다.

Keywords

References

  1. ASTM D5918-06 (2006), Standard test methods for frost heave and thawing weakening susceptibility of soils, American Society for Testing Materials, pp. 401-412.
  2. Cho, S. D., Lee, D. Y., Kim, J. H. and Kim, N. H. (2003), Evaluation of the permanent deformation behavior on geosynthetics-reinforced aspalt pavement by using the wheel tracking tests, Journal of the Korean Geosynthetics Society, Vol. 2, No. 3, pp. 83-90 (In Korean).
  3. Eom, D. Y. (2014), Comparison of performance on epoxy asphalt mixtures using various epoxy resins, Master's thesis, Seoul National University of Science and Technology, pp. 1-33 (In Korean).
  4. JGS 0171 (2003), 凍上性判定のための土の凍上試驗方法,地盤工學會基準, 日本地盤工學會.
  5. JGS 0172 (2003), 凍上性判定のための土の凍上試驗方法,地盤工學會基準, 日本地盤工學會.
  6. Kang, J. M., Kim, Y. S. and Lee, J. G. (2013), Evaluation method of frost heave for unsaturated soils, Journal of the Korean Geosynthetics Society, Vol. 1, No. 12, pp. 93-1001 (In Korean).
  7. Kim, K. S. (2015), Drainage analysis and applicability evaluation of PET aggregate, Ph D. dissertation, Incheon National University, pp. 1-123 (In Korean).
  8. Ministry of Land, Infrastructure and Transport (2015), Guidelines for the production and construction of asphalt mixtures.
  9. Ministry of Maritime Affairs and Ficheries (2014), 제2차 연안정비(변경) 기본계획 수립 연구보고서.
  10. Oh, S. B. (2008), Comparative analysis on reinforcement effect by chemical stabilization for soft clay, Master's thesis, Incheon National University, pp. 1-76 (In Korean).
  11. Park, H. K. and Kim, K. R. (2003), A study of correlation between soil characteristic and CBR value by experimented method, Journal of the Korean Geo-Environmental Society, Vol. 4, No. 1, pp. 41-48 (In Korean).
  12. Ryu, B. H. (2013), Deformation factors and behavior characteristics of the water supply pipeline during ground freezing, Ph D. dissertation, Incheon National University, pp. 55-56 (In Korean).
  13. Shin, E. C., Park, J. J. and RYU, B. H. (2009), Geotechnical characteristics of frost-susceptibility soil using modified freeze-thaw apparatus, Journal of the Korean Geosynthetics Society, Vol. 8 No. 1, pp. 53-59 (In Korean).