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Title: 消石灰と石膏による児島湖凌渫土の透水性改良
Other Titles: Improvement of Permeability of Lake Kojima Sediment with Hydrated Lime and Gypsum
Authors: 石黒, 宗秀1 Browse this author →KAKEN DB
濱邊, 亜希子2 Browse this author
赤江, 剛夫3 Browse this author
Authors(alt): ISHIGURO, Munehide1
HAMABE, Akiko2
AKAE, Takeo3
Keywords: 底泥
saturated hydraulic conductivity
hydrated lime
Issue Date: Oct-2002
Publisher: 農業農村工学会
Journal Title: 農業土木学会論文集
Journal Title(alt): Transactions of The Japanese Society of Irrigation, Drainage and Reclamation Engineering
Volume: 221
Start Page: 43(575)
End Page: 48(580)
Publisher DOI: 10.11408/jsidre1965.2002.575
Abstract: 湖沼富栄養化の一因と考えられている児島湖凌喋土を用いて, 消石灰および石膏による透水性の改良方法を検討した. 消石灰あるいは石膏を, 湊喋土と混合する方法, 表面散布する方法, 溶液状態で浸透させる方法の3種類の添加方法で, 飽和透水試験装置を用いて飽和透水係数を比較した. 石灰は, 古くから土質安定処理に用いられ, その安定処理により透水性は減少するとされているが, 実験により, 消石灰では, 混合法により, 比較的大きな飽和透水係数が維持されることを明らかにした. これは, 混合によりある程度不均質に試料中に分布した消石灰が化学反応を起こして構造を安定化させたため考えられる. 一方, 石膏は, 溶液浸透法による結果が消石灰の混合法による結果と同程度の透水性を示した. これは, 石膏の場合, Caが静電気力による吸着で凝集効果を及ぼしたためと考えられる.
Improvement method of permeability of Lake Kojima Sediment with hydrated lime and gypsum were investigated. Three application methods were compared in the saturated hydraulic conductivity experiment; mixing, surface distribution and solution percolation. Lime has been used for soil stabilization for a long time and the stabilized soil permeability was considered to become low. However, our experiment showed that hydrated lime application with mixing maintained high hydraulic conductivity. The soil structure was supposed to be stabilized by chemical reaction between soil and heterogeneously distributed hydrated lime. On the other hand, gypsum application with solution percolation maintained the same hydraulic conductivity as that of hydrated lime application with mixing. In that case, electrostatic adsorption of Ca was considered to generate flocculation and kept high permeability.
Rights: © 社団法人 農業農村工学会
© The Japanese Society of Irrigation, Drainage and Rural Engineering
Type: article
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 石黒 宗秀

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