[PDF][PDF] Assessment of shear and compressibility properties of asphalt stabilized collapsible soil

S Sarsam, A Al Saidi, A Al Taie - Applied research journal, 2016 - researchgate.net
S Sarsam, A Al Saidi, A Al Taie
Applied research journal, 2016researchgate.net
In the field of design and construction of roadway, several problems that faces the engineer
occurs due to the environmental changes such as surplus water in the soil which causes
wetting to the soil of the embankment, and generated loss in shear strength and/or
excessive deformation (settlement). For collapsible granular soil, the loss of binding material
for coarse grains of soil causes volumetric changes and shear failure when such compacted
soil come in touch with water,[1]. In order to overcome such problems and improve the …
In the field of design and construction of roadway, several problems that faces the engineer occurs due to the environmental changes such as surplus water in the soil which causes wetting to the soil of the embankment, and generated loss in shear strength and/or excessive deformation (settlement). For collapsible granular soil, the loss of binding material for coarse grains of soil causes volumetric changes and shear failure when such compacted soil come in touch with water,[1]. In order to overcome such problems and improve the collapsible soil properties, soil stabilization is considered as one of the appropriate techniques that can be carried out. Asphalt stabilization can provide more stable engineering properties for the embankment soil from the strength, stiffness, compressibility, permeability, and sensitivity to changes in moisture content. The term collapsing soils is generally mean a soil that undergoes a sudden decrease in volume where an external load has been applied to the soil or an excessive water has come in touch with the soil,[2]. Such soils generally consist of (50-90)% silt particles and sand, silty and clayey types have been recognized by [3]. Collapsible soils possess porous textures with high void ratio and low densities; they often have adequate void space in their natural states to hold their liquid moisture content at saturation case. Collapsible soils are also characterized by low initial bulk density and natural water content, low plasticity, high stiffness and strength in the dry state, high percentage of fine grained particles, and often by particle size in the silt to fine sand range,[3].
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