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Geomechanics5 - Soil Classification

Some images from Sivakugan and Das (2010)
by

Adrian McCallum

on 23 August 2017

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Transcript of Geomechanics5 - Soil Classification

How might we classify it?
What's soil?
Major soil groups (by %)
Soil Classification
Soil groups (by size)
Coarse-grained soils
How might we determine this?
1. Grain size distribution
2. Relative density
3. Grain Shape?
www.polleverywhere.com/amccallum
Review Quiz!
What's a coarse-grained soil?
How might we (as engineers) classify it?
Generally influenced by three factors:
1. Relative proportion of
different grain sizes
2. Density of packing, and
3. Grain shape
How might we determine this?
Definition:

Soil is .....
What's a fine-grained soil?
From Sivakugan & Das (2010)
From Sivakugan & Das (2010)
How might we describe this soil?
What about fine-grained soils?
What did we cover last week?
How does it relate to this week?
What's the grading of a soil?
Why does it matter?
Let's talk more on these...
What's e (void ratio)?
1. What is particular about the structure of clay?
2. What primary forces are involved (there are a few...)
Three major clay minerals
same composition
different configuration
different behaviour...

That's it; what did we cover?
Next week...
Questions?
5 min - Padlet - What is soil?
Questions?
Questions?
Units?
What is each of these?
Loam:

a fertile soil of clay and sand containing humus.

a soil with roughly equal proportions of sand, silt, and clay
Full transcript