Three-Phase Diagram Of Soil | Two-Phase Diagram Of Soil
The first question is, what is the soil phase? So the soil phase is the homogeneous part of the soil system different from other parts of the soil system for example solid and water are the two different homogeneous parts of the soil.
Now the second question arises, what is the phase diagram? So the phase diagram is nothing but a simple diagrammatic representation of real soil.
Three-Phase Diagram Of Soil
As we know that soil mass consists of three constituents that is solid particles, water, and air, these three constituents are mixed together and form a complex material.
For better understanding and convenience, the actual soil mass diagram (complex material) is simplified in a simple diagram, this diagram is called a three-phase diagram of soil.


In the Three-Phase Diagram Of Soil the solid particles, water, and air are separated and placed at the lower layer, medial layer, and upper layer respectively.
Three-Phase Diagram In Terms Of Voids Ratio


Three-Phase Diagram In Terms Of Porosity


Two-Phase Diagram Of Soil
As we all know that soil mass has voids and these voids are filled with air or water, or partly with air and partly with water, and form a three-phase system.
When the soil mass becomes completely dry (having only air) or the soil has no air that soil becomes fully saturated, then the three-phase system of soil becomes a two-phase system.


This actual two-phase system(complex material) is simplified in a simple diagram, this diagram is called a Two-Phase Diagram Of Soil.
More Read- Geotechnical Engineering Terms And Definitions
Frequently Asked Questions(FAQ)
The three-phase diagram is a simple diagrammatic representation of the three-phase system of soil for better understanding and convenience.
The three-phase of soil is solid, water, and air.
The main use of a phase diagram of soil is, in the study of the various terms in soil engineering and is also used for easy understanding and convenience in calculation problems.
The two-phase diagram of soil is a simple diagrammatic representation of the two-phase system of soil.
The volume of void in the three-phase diagram of soil is the sum of the volume of water and the volume of air.