Saturday, February 5, 2022

Soil origin & type

⇒father →Dr. Karl Terzaghi

⇒Pedogenesis: process of soil formation

⇒geological cycle : Weathering → transportation →deposition →upheavel →wheathering & repeat.

⇒Residual soil : bentonite

⇒Glacial soil : till, drift ,glacier deposit

⇒ colluvial /talus : Gravity deposit ,found in valley

⇒muck or peat : swamp & march deposit

TYPES OF SOIL :

⇒Alluvial : river deposit, dark in colour

⇒black cotton soil : low shearing strength , more swelling & shrinkage due to montmorillonite.

⇒Loess : wind blown, collapsible, (0.1mm - 0.05mm), yellowish or pallor colour.

⇒Loam : mix of sand silt & clay; best for plant growth & garden.

⇒Bentonite : a clay ,formed from volcanic ash by chemical action,used as lubricant.

⇒Peat : organic soil ,wind blown

★soil containing organic matters are of spongy nature.

Posted by : Jagmohan Singh Panwar Tags : SOIL and FOUNDATION

civil topicwise