application of soil conditioners for remediation of saline- sodic soils is one of the common methods for improving soil properties in arid and semi-arid regions. in order to study the effect of soil conditioners on retention of soil moisture content, an experiment was carried out based on randomized complete block design with three replications in a saline-sodic sandy clay loam soil. the treatm...

Several methodologies have been developed and used by researchers for measuring either total suction ψ (sum of matric suction ψm and osmotic suction ψo), or only ψm. While employing different methodologies for establishing the soil-water characteristic curve, SWCC, there is a possibility that the factors such as the type of the soil suction measured, measurement range, equilibration time, prese...

Unsaturated soils are commonly widespread around the world, especially at shallow depths from the surface. The mechanical behavior of this near surface soil is influenced by the seasonal variations such as rainfall or drought, which in turn may have a detrimental effect on many structures (e.g. retaining walls, shallow foundations, mechanically stabilized earth walls, soil slopes, and pavements...

Gypsum is a soluble material, and it one of the problematic components in soil west Iraq. Al-Najaf governorates Iraq which suffers from gypsum content different levels. The city mainly sand-sized particles bonded by percentages gypsum. main problem this component dissolution upon wetting process. This paper investigates effect decreasing matric suction (wetting) on deformation under specific st...

Soil suction is one of the most important parameters describing moisture condition unsaturated soils. The measurement soil crucial for applying theories engineering behavior soils.The filter paper method techniques In this paper, five samples were collected from sites within Baghdad city – al-Rasafa region. These soils have different properties and they prepared at degrees saturation. For each ...

This research investigates the influence of matric suction on variation shear modulus and damping ratio a silty soil in very small to medium strain levels. A set laboratory experiments including three bender elements tests addition resonant column-torsional have been carried out unsaturated Firuzkuh silt specimens. In this regard, an triaxial cell equipped with device that can apply control use...

As most previous studies have neglected the positive influence of salinity (osmotic suction) on coastal soils in Australia, design transport infrastructure involving these has often been overly conservative. In this study, a laboratory approach based direct shear testing was explained to determine stress–strain behavior compacted silty clay (CL) at different levels osmotic suction generated by ...