压实
多孔性
曲折
壤土
土壤水分
岩土工程
微观结构
磁导率
地质学
材料科学
土壤科学
矿物学
复合材料
化学
膜
生物化学
作者
Harifidy Ranaivomanana,Andry Razakamanantsoa,Ouali Amiri
出处
期刊:International Journal of Geomechanics
[American Society of Civil Engineers]
日期:2017-04-01
卷期号:17 (4)
被引量:33
标识
DOI:10.1061/(asce)gm.1943-5622.0000792
摘要
The present paper deals with the proposition of an original analytical permeability model of compacted soils. The model involves the microstructure of the material through the porosity and the pore-size distribution obtained by mercury intrusion porosimetry (MIP), as well as the degree of compaction. Their effects on the morphological parameters of the porous network (tortuosity and interconnection of pore network) are studied. The model was developed and tested on various types of soil: a loamy sand, a gravelous sand, a clay, and an alterite. Samples were compacted with various degrees of compaction: 85, 95, 100, and 105% of the optimum dry density as determined by a standard compaction method. The experimental results obtained for both loamy and gravelous sands and for clay were well reproduced by the model, except for the alterite. Such results might be explained by the high brittleness of the alterite, leading to a crumbling phenomenon rather than to its densification during the compaction process.
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