Fall Head Permeability Set

• Description:

• Clays and silts are tested using the falling head technique. Flow of water through the specimen is observed by monitoring the rate of

  fall of water in the tube. It is essential that soils of very low permeability are sealed inside the cylinder to prevent seepage

  along the sides of the specimen. Before testing, the specimen must be completely saturated with water as the presence of air will

  restrict the flow of water

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