Effect of soil consistency on flow characteristics of acids through cohesive soils

Abstract EN

The consistency of cohesive soil depends to a large extent on the structure of soil particles which may be arranged in two systems; dispersed or flocculated.

The presence of salts or acids between the soil particles will alter the arrangement of particles through affecting the attractive and repulsive forces.

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In this paper, a program of laboratory tests is carried out at the University of Technology / Baghdad on cohesive soils of different values of Atterberg limits.

Samples of these soils were tested for grain size distribution (sieve analysis and hydrometer).

The falling head permeability test was carried out to determine the coefficient of permeability of the soils to HCl acid.

The soil parameters determined in the laboratory will be used in the numerical analysis.

The aim of this study is to apply the finite element method to study the steady flow of pollutants (acids) in a confined aquifer.

The program (MULAT) is used for this purpose.

The path of flow of the acid through the soil is traced.

The basic problem solved in this paper is a one of linear flow in a single confined aquifer.

It represents the case of leakage of acids from storage tank and flow of the acids through the foundation soil.

It was concluded from the finite element results that the maximum head caused by the flow of the acid through the soil decreases with the increase of the coefficient of permeability and the plasticity index of the polluted soil.