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