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Plasticity Index is difference between liquid limit and plastic limit. Check FAQs
Ip=Wl-Wp
Ip - Plasticity Index?Wl - Liquid Limit?Wp - Plastic Limit?

Plasticity Index of Soil Example

With values
With units
Only example

Here is how the Plasticity Index of Soil equation looks like with Values.

Here is how the Plasticity Index of Soil equation looks like with Units.

Here is how the Plasticity Index of Soil equation looks like.

1.2Edit=2.4Edit-1.2Edit
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HomeIcon Home » Category Engineering » Category Civil » Category Geotechnical Engineering » fx Plasticity Index of Soil

Plasticity Index of Soil Solution

Follow our step by step solution on how to calculate Plasticity Index of Soil?

FIRST Step Consider the formula
Ip=Wl-Wp
Next Step Substitute values of Variables
∴ Ip=2.4-1.2
Next Step Prepare to Evaluate
∴ Ip=2.4-1.2
LAST Step Evaluate
∴Ip=1.2

Plasticity Index of Soil Formula Elements

Variables
Plasticity Index
Plasticity Index is difference between liquid limit and plastic limit.
Symbol: Ip
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Formulas to find Plasticity IndexOpen Variable
Liquid Limit
Liquid limit is the water content of the soil that would correspond to the standard groove closing in 25 drops of the cup.
Symbol: Wl
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Formulas to find Liquid LimitOpen Variable
Plastic Limit
Plastic limit is water content at which soil changes from semi solid to plastic state.
Symbol: Wp
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Formulas to find Plastic LimitOpen Variable

Other Formulas to find Plasticity Index

​Go Plasticity Index of Soil given Liquidity Index
Ip=w-WpIl
​Go Plasticity Index of Soil given Activity Index
Ip=(Ac⋅μ)

Other formulas in Atterberg Limits category

​Go Plastic Limit of Soil given Plasticity Index
Wp=Wl-Ip
​Go Liquid Limit of Soil given Plasticity Index
Wl=Ip+Wp
​Go Liquidity Index of Soil
Il=w-WpIp
​Go Moisture Content of Soil given Liquidity Index
w=((Il⋅Ip)+Wp)

How to Evaluate Plasticity Index of Soil?

Plasticity Index of Soil evaluator uses Plasticity Index = Liquid Limit-Plastic Limit to evaluate the Plasticity Index, The Plasticity Index of Soil is defined as the difference of liquid limit and plastic limit. Plasticity Index is denoted by Ip symbol.

How to evaluate Plasticity Index of Soil using this online evaluator? To use this online evaluator for Plasticity Index of Soil, enter Liquid Limit (Wl) & Plastic Limit (Wp) and hit the calculate button.

FAQs on Plasticity Index of Soil

What is the formula to find Plasticity Index of Soil?
The formula of Plasticity Index of Soil is expressed as Plasticity Index = Liquid Limit-Plastic Limit. Here is an example- 0.6 = 2.4-1.2.
How to calculate Plasticity Index of Soil?
With Liquid Limit (Wl) & Plastic Limit (Wp) we can find Plasticity Index of Soil using the formula - Plasticity Index = Liquid Limit-Plastic Limit.
What are the other ways to Calculate Plasticity Index?
Here are the different ways to Calculate Plasticity Index-
  • Plasticity Index=(Water Content of Soil-Plastic Limit)/Liquidity IndexOpenImg
  • Plasticity Index=(Activity Index*Percentage of Clay Fraction)OpenImg
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