PPT - Soil Classification Civil Engineering (CE) Notes | EduRev

Soil Mechanics

Civil Engineering (CE) : PPT - Soil Classification Civil Engineering (CE) Notes | EduRev

 Page 1


Soils and their Classification
Page 2


Soils and their Classification
Soils - What are they?
u Particulate materials
- Sedimentary origins (usually)
- Residual
u Wide range of particle sizes
- larger particles: quartz, feldspar
- very small particles: clay minerals
u Voids between particles
Page 3


Soils and their Classification
Soils - What are they?
u Particulate materials
- Sedimentary origins (usually)
- Residual
u Wide range of particle sizes
- larger particles: quartz, feldspar
- very small particles: clay minerals
u Voids between particles
Aragonite-rich soil x 2000
Page 4


Soils and their Classification
Soils - What are they?
u Particulate materials
- Sedimentary origins (usually)
- Residual
u Wide range of particle sizes
- larger particles: quartz, feldspar
- very small particles: clay minerals
u Voids between particles
Aragonite-rich soil x 2000
Page 5


Soils and their Classification
Soils - What are they?
u Particulate materials
- Sedimentary origins (usually)
- Residual
u Wide range of particle sizes
- larger particles: quartz, feldspar
- very small particles: clay minerals
u Voids between particles
Aragonite-rich soil x 2000
Need for Simple Classification
u Usually soil on site has to be used.
– Soils differ from other engineering materials in that
one has little control over their properties
u Extent and properties of the soil have to be determined
u Cheap and simple tests are required to give an indication
of engineering properties, e.g. stiffness, strength, for
preliminary design
The classification must use core samples obtained from the ground.
This information is often supplemented by in-situ tests such as cone
penetration tests.
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