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Swelling pressure is the pressure exerted by expansive soil when it absorbs water and tries to increase in volume but is restrained. It is an important concept in Geotechnical Engineering, especially for clayey soils. Where it Occurs Expansive soils like black cotton soil Clay minerals such as montmorillonite Areas with seasonal moisture changes Cause Water absorption by clay particles Increase in volume (swelling) Restrained condition creates pressure Applications / Importance Design of foundations on expansive soils Construction of roads and pavements Stability of buildings and structures Design of canals and retaining structures Preventing cracks and uplift in structures Soil stabilization and treatment design
