Original Research Article
Year: 2020 | Month: March | Volume: 7 | Issue: 3 | Pages: 403-412
Study of Void Ratio Influence on Soil Permeability: Application to Clay and Silty Soils in Northern and Southern Togo
Abalo P’KLA1, Yawovi Mawuénya Xolali Dany AYITE1, Agapi Kocouvi HOUANOU2
1Research Team in Civil Engineering, Engineers High National School, University of Lome, 01 BP 1515, Lome, Togo
2Laboratory of Energetics and Applied Mechanics - Polytechnic School of Abomey-Calavi, University of Abomey-Calavi, 01 BP 2009, Cotonou, Benin
ABSTRACT
Soil permeability depends on multiple factors, among which the compactness which is itself linked to the density and the void ratio. The purpose of this work is to determine the correlations that may exist between permeability coefficient and void ratio of clay and sandy soils present in the north and south of Togo. To do this, samples of these soils were compacted at different compaction energies and then subjected to permeability tests using a variable load permeameter. The test of different mathematical models of regression analysis made it possible to establish correlations between permeability coefficient, k20, at 20°C of these materials and their void ratio, e. Thus, a correlation model in the form k20 = 10-2 × e15 has been proposed. Studies are continuing to see if this proposed model for the materials studied can be extended to other materials with different geotechnical characteristics.
Keywords: void ratio, correlations, permeability coefficient, variable load, clay and silty soils.
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