WHAT ARE THE ATTERBERG LIMITS OF SOIL?

Atterberg borders of soil

word atterberg border The Swedish cultivar is named according to Albert Atterberg, When water is added to a clay mass, it changes its state from solid to liquid. He divided the entire chain from solid to liquid into four phases:


  1. solid state
  2. semi solid state
  3. plastic kingdom
  4. liquid state

They set arbitrary limits, which are called . is referred to as atterberg border or Consistency Limit, for these divisions in terms of water content. Thus atterberg border is the amount of water at which soil mass moves from one state to another. These limits are presented as the percentage of moisture present inside the soil. atterberg border Which are commonly used for engineering purposes:

  1. liquid limit
  2. plastic border
  3. shrinkage limit

What is the liquid limit of soil?

The liquid limit is the amount of water corresponding to an arbitrary boundary between the liquid and plastic state of a soil consistency. It is defined as the minimum water content at which the soil is still in a liquid state but has a small shear strength against flowing.

What is the plastic limit of clay?

The plasticity limit is the amount of water corresponding to an arbitrary range between the plastic and semi-solid states of a soil consistency. It is defined as the minimum amount of water at which the soil will begin to crumble when rolled into a thread of about 3 mm in diameter.

What is the shrinkage limit of soil?

The shrinkage limit is defined as the maximum water content at which a reduction in water content will not result in a decrease in the amount of soil mass. This is the lowest water content at which a soil can still be completely saturated.



Er. Mukesh Kumar

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Er. Mukesh Kumar is Editor in Chief and Co-Funder at ProCivilEngineer.com Civil Engineering Website. Mukesh Kumar is a Bachelor in Civil Engineering From MIT. He has work experience in Highway Construction, Bridge Construction, Railway Steel Girder work, Under box culvert construction, Retaining wall construction. He was a lecturer in a Engineering college for more than 6 years.