Lecture 12 - Soil continued Flashcards
1
Q
How to determine grain size distribution?
A
Coarse grains- Sieve analysis
Fine grains- hydrometer/sedimentation analysis
2
Q
Sieve analysis
A
Calculate the mass passed through the sieve and the mass which was retained
3
Q
What is D50
A
The mean particle diameter
4
Q
Coefficient of Uniformity
A
Cu = D60/D10
5
Q
Ceofficient of Cruvature
A
Cc = (D30)^2/(D10)(D60)
6
Q
Well graded
A
Contains a large range of particle sizes
7
Q
Uniformly/poorly graded
A
Contains narrow range of particles
8
Q
Gap graded
A
Contains a gap of a portion of ranges
9
Q
Void ratio
A
Ratio of volume of voids to vol of solid particles, e = Vv/Vs
10
Q
Relative density
A
How densely granis are packed in a coarse grained soil in %, Dr = (emax-e)/(emax-emin)
