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28 Cards in this Set

  • Front
  • Back
In situ water content of a saturated normally consolidated clay can be expected to be near the plastic limit
False
A solil with a UNIFIED (USCS) classification of ML is a fine-grained soil consisting primarily of plastic soil particles.
False
In the AASHTO classification system, A-6 soils are typically sands.
False
In the AASHTO classification system, A-2 soils are typically clays.
False
For saturated clays, the compression index increases as liquid limit increases.
True
Clay-sized particles will pass through a No. 200 sieve.
True
Cohesive soils have structures described with terms like dispersed and flocculated.
True
On a Mohr circle plot, the p,q point is at the top of the circle.
True
The higher the relative density the more _________ a soil is.
dense
Water content has little effect on strenght
True
3 of the most common clay minerals are
kaolinite, illite, and morillonite
High PI means that the soil has a high __________
swell potential
0----SL----PL----LL----w%
Atterberg limits
OCR =
pre-consolidated stress/ vertical stress
Drain strenght tends to decrease with an increase in PI
True
It is impossible to have a water content over 100%
False
A1 and A2
gravels and sands
A3
sands
A4 and A5
silts
A6 and A7
clays
A8
highly organic
The lower the GI number the
better
K=
horizontal effective stress/
vertical effective stress
OCR varies vertically even with a homogenious clay, and varies with the top being the highest
True
Cc
Compression index
Cs
recompression index or swelling index
Sc
primary consolidated settlement
If "double drained" H=
L/2