Three pedons were selected representing the soil series of study area in Baiji city, which are Khadraniya, Al-Sharqat, and Manjour soils series, calcareous gypsiferous soils, to diagnose some micro-morphological Features horizons. Pedons morphologically described, disturbed undisturbed samples collected from each horizon. The presence (calcic) (gypsic) horizons has been diagnostic by morphologi...

The examination of the meso-mechanical properties soils is fundamental to understand its macro-behaviour. This paper aims evaluate potential application Digital Image Correlation (DIC), an optical image processing approach, in direct shear test (DST) for soils. Hence, a new box was designed investigate close behaviour granular materials. noise-floor and displacement accuracy were discussed asse...

The persistence, movement and metabolism of insecticides in soils are affected by various environmental conditions. Field data are presented, showing that phorate—after granular band application—moved in both horizontal and vertical directions. Phorate sulphone was the major metabolite recovered. The metabolism and persistence of this insecticide was also affected by its mode of application. Ut...

The performance of a recently developed state-dependent constitutive model for unsaturated granular soils is evaluated. employs the Bounding Surface plasticity framework and evaluates elastic strains assuming hyperelastic behavior. To realistically simulate deformation soils, mechanical behavior was modeled without purely component. inherent hydro-mechanical coupling realized by introducing Bis...

Seashores and river bottoms are constantly eroded by the flow processes. Grains of various types, including gravel, sand, silt, clay, mixed at different ratios, demonstrating varying characteristics, constituent materials these eroding land features. The present study quantifies importance geomechanical properties soils, with a large fraction granular material smaller portion fine grain particl...

This paper presents the effect of geogrid tensile strength by calculating pullout resistance and geogrid-soil interaction mechanism. In order to investigate this interface, a series of pullout tests have been conducted by large scale reformed direct shear test apparatus in both cohesive and granular soils. In numerical, finite difference software FLAC3D has been carried out on experimental test...

End-of-life tires (ELTs) represent a great source of readily available, low-cost and sustainable construction materials having excellent engineering properties. Their reuse (in the form granulated rubber mixed with soils) in large-volume recycling civil (geotechnical) applications would be beneficial should encouraged. It is estimated that at present worldwide only less than 10% ELTs are reused...

The modified Kovács (MK) model can be considered as one of the most versatile predictive models available to estimate the unsaturated hydraulic functions. The MK model relies on basic geotechnical properties to obtain the water retention curve (WRC), which can then be used to define the relative permeability function. In addition, the model can also take into consideration hysteresis effects an...