# Geotechnics lecture 2

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• Created by: cbd19
• Created on: 09-02-20 23:25
What is formula for degree of saturation?
Vw/ Vv
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What is formula for bulk unit weight?
γ = ρg
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What is formula for saturated unit weight?
γ sat = (Gs + e/ 1+e )γ w = Ws + Ww/ 1+e
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What is formula for dry unit weight?
γ d = (Gs /1+ e)γ w = γ/ 1+w = Ws/ 1+e
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what's formula and definition for porosity? Porosity (n);
fraction of volume of voids between 0 and 1. Vv/VT * 100%
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What's formula for Specific volume (v); and definition?
Ratio of a substance's volume to it's mass. v = V/M
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what's formula for Effective (or buoyant) unit weight (γ).
Effective mass per unit volume when the soil is completely submerged in water. γ′=(G−1)γw/1+e which is same as saturated unit weight minus unit weight of water.
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What is true when Vs=1?
When Vs = 1, Vv= e
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## Other cards in this set

### Card 2

#### Front

What is formula for bulk unit weight?

γ = ρg

### Card 3

#### Front

What is formula for saturated unit weight?

### Card 4

#### Front

What is formula for dry unit weight?

### Card 5

#### Front

what's formula and definition for porosity? Porosity (n);