Abstract Numerous important earthen heritage sites in northwestern China have survived until today because of the arid and semi-arid climate. However, most them suffer from various types degrees deterioration, with many questions not answered. Scaling off is one main deterioration widely observed at Site Yar City. To clarify underlying mechanisms cracked surface crust formation, previous experi...

Several structures are built on collapsible soils in the mining and petroleum industries civil sites. In order to analyze stability of such structures, one must properly study unsaturated soil behavior. Collapsible frequent sand that susceptible a significant sudden reduction volume upon wetting. An important factor is matric suction, which es related moisture content through water Characterist...

Soils at the ground surface experience multiple cycles of drying and wetting. On drying, soils shrinkage cracks may appear. The development depends on tensile strength soil. Such increase permeability soil can cause slopes earth structures to fail due rainfall. Several models have been proposed for unsaturated considering effect matric suction. However, are either cohesionless (coarse-grained) ...

This study looks into the influence of matric suction on volume change gypsum sand soil in unsaturated conditions. The specimens were collected from Al-Najaf, Iraq, and included 14 29% gypsum. Three series initial stress laboratory tests utilized a modified oedometer device. For each content, twelve remolded examined circumstances with applied using four matrices (30 kPa, 18 9 saturated state)....

Exploring the water retention properties of unsaturated soil from perspective a liquid bridge has been popular issue in recent years. This study first measures soil–water characteristic curves (SWCCs) granular specimens to determine influence particle size on matric suction macroscopic perspective. Then, internal mechanism and volumetric content is analyzed mesoscopic by using Young–Laplace (Y–...

Abstract Discrete randomly distributed fibers are commonly used to improve the engineering characteristics of soil and thus properties such as shear strength, compressibility, density, hydraulic conductivity. Most studies have so far focused on describing behavior soils containing under dried or saturated conditions. However, water table may seasonally fluctuate, generating unsaturated Therefor...

In the common practice of geotechnical design, state soil is considered fully saturated, while recent examples show importance consideration unsaturated conditions as well due to location groundwater table at deeper levels. However, it problematic design a foundation and calculate bearing capacity internal stress in needs be quantified. The mechanics soils are critical engineering, especially w...

Determining osmotic suction from the electrical conductivity (EC) of soil pore water was widely reported in literature. However, while dealing with unsaturated soils, they do not have enough to be extracted for a reliable measurement EC. In this paper, chilled-mirror dew-point hygrometer and contact filter paper method were used determine total matric suctions low-plasticity soils different sal...

-Soil compaction in cropping systems, caused by the external pressure of machinery, creates impermeable layers that restrict water and nutrient cycles reducing agricultural production. To evaluate matric suction effects on distribution with depth stresses a soil, use Jet Fill tensiometers were installed at two different depths (i.e. 0.15 m, 0.30 m) soil profile constituted silty sand gravel (SM...