論文

査読有り
2020年9月

Water retention properties of sands mixed with Ca-Mg composites as attenuation layer

Japanese Geotechnical Society Special Publication
  • Kato Tomohiro
  • ,
  • Gathuka Lincoln W.
  • ,
  • Takai Atsushi
  • ,
  • Katsumi Takeshi

8
4
開始ページ
109
終了ページ
114
記述言語
英語
掲載種別
研究論文(国際会議プロシーディングス)
DOI
10.3208/jgssp.v08.j23
出版者・発行元
公益社団法人 地盤工学会

<p>One strategy currently being explored in the development of a technically simple and practical countermeasure when utilising geogenic contaminated soils as fill materials in an embankment involves the installation of a compacted soil layer with attenuation capacity underlain the contaminated geomaterials. Water retention property, which is one of the important soil hydraulic properties in the simulation of water flow, needs to be better understood for selecting a suitable composite of base material and stabilizing agent as the attenuation layer. In this study, the water retention characteristics of six composites with different sandy soils and calcium-magnesium composite sizes were investigated. It was found out that mixing the sandy soil with the mineral-based agent improves its water retention characteristics, especially when the soil is a well-graded type. The highest residual saturation (Srf) was found for the decomposed granite soil mixed with the powder agent of under 2 mm, which reached 87%. Poorly-graded sandy soils like the silica sand were found not to be suitable base material for the attenuation layer, because they drastically become impermeable, where k reaches nearly 1×10-14 m/s from very small changes in negative pressures.</p>

リンク情報
DOI
https://doi.org/10.3208/jgssp.v08.j23
CiNii Articles
http://ci.nii.ac.jp/naid/130007908644
URL
https://www.jstage.jst.go.jp/article/jgssp/8/4/8_v08.j23/_pdf
ID情報
  • DOI : 10.3208/jgssp.v08.j23
  • eISSN : 2188-8027
  • CiNii Articles ID : 130007908644

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