Collapsible soils have porous structure, high void ratios, and relatively low dry unit weights in dry conditions. These soils consist mainly of wind-blown silt. Collapsible soils are moisture sensitive and susceptible to large reductions in volume primarily, with increase in moisture content. In this investigation, a commonly found collapsible soil, known as loess was tested on the laboratory compacted specimens to study its volume change behavior. The collapse tests were conducted using conventional oedometer. The collapse potential of loess was found to be dependent on the initial water content, initial dry unit weight and flooding stress (vertical stress at inundation).
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