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Characteristics of Soil-Water Characteristic Curve and Unsaturated Permeability of Sludge Mixture

정수슬러지 혼합토의 함수특성곡선과 불포화 투수 특성

Byung-Gwon Lim1
,
Yun-Tae Kim2*
임 병권1
,
김 윤태2*
1Graduate Student, Dept. of Ocean Engrg., Pukyong National Univ.
2Associate Prof., Dept. of Ocean Engrg., Pukyong National Univ.
1부경대학교 해양공학과 석사과정
2부경대학교 해양공학과 부교수
*교신저자. *Corresponding Author. 
28 February 2013. pp. 57-64
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Abstract

In this paper, in order to solve high water content of water sludge and promote its recycle, sludge mixtures with various mixing ratios were produced. Sludge mixture consisted of water sludge and weathered granite soil. Their physical properties and unsaturated characteristics (soil-water characteristic curve, and unsaturated permeability function) were investigated by laboratory tests. Experimental test results indicated that at a given matric suction volumetric water content of sludge mixture increased as water sludge content increased. Air entry values of sludge mixture increased from 0.9 kPa to 2.4 kPa with an increase in water sludge content or fine content. In addition, unsaturated permeability function, which is an important factor for performing infiltration analysis, was predicted using saturated permeability and soil-water characteristic curve of sludge mixture.

Keywords
Sludge mixture
Soil-water characteristic curve
Unsaturated permeability function
Water sludge

본 논문에서는 정수슬러지의 고함수비 문제를 해결하고 재활용을 촉진하기 위해 정수슬러지와 화강풍화토를 다양한 배합비로 혼합하여 슬러지혼합토(sludge mixture)를 제작하고, 다양한 실내 시험을 통해 슬러지혼합토의 물리적 특성과 불포화 특성을 분석하였다. 시험 결과, 정수슬러지 함량이 증가함에 따라 동일한 모관흡수력에 대응하는 체적함수비는 증가하였다. 또한 정수슬러지 함량 또는 세립분 함량이 증가함에 따라 공기함입치는 0.9kPa에서 2.4kPa로 증가하였다. 슬러지혼합토의 포화투수계수 값과 함수특성곡선의 결과를 활용하여 강우 시 침투해석을 수행하는데 있어서 중요한 인자인 불포화 투수함수를 산정하였다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 29
  • No :2
  • Pages :57-64
  • Received Date : 2012-12-10
  • Accepted Date : 2013-01-25
  • DOI :https://doi.org/10.7843/kgs.2013.29.2.57
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