Some of Sedimentological & Geotechnical Properties  of  Marshes Deposits (southern Iraq)

Razzaq Mutasher, Wissam

	Some of Sedimentological & Geotechnical Properties of Marshes Deposits (southern Iraq)
basrah journal of science
Article 1, Volume 25, Issue 2, 2007, Pages 34-47 PDF (0 K)
Author
Wissam Razzaq Mutasher
Abstract
The present study has focused on some of sedimentological analysis, which are statistical, grain size distribution, and clay minerals identification. The sediment samples were collected from three main Marshes in Southern Iraq. This study deals also on Some geotechnical properties as engineering soil classification, plasticity, activity of clay, permeability and consolidation parameters of Marshes Soil. The results of the Grain size analysis and Statistical Parameters showed that the Marsh Soil is clayey silt and silty clay with high fine grain content (Clay & Silt) reach to (85%-95%). The statistical parameters refer to marshes environment, being far from influence of Coastal environment. Clay minerals are smectite-illite mixed layers, kaolinite, chlorite and palygorskite. The results of the geotechnical properties show high plasticity, plasticity index and liquidity index are 25 and 0.3 respectively. The average of permeability is 0.015 m/s and activity of Clay is 0.8. The coefficient of consolidation and compression index are 0.013 m2/s and 0.36 respectively. The Ahwar soils are able to vary in their geotechnical properties due to the presence of fine grains of high content in the swelling mineral and the variation in the moisture content, in addition to a notable thickness of a surface clay layer which represents the river and ahwar sediments.

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