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10 Cards in this Set

  • Front
  • Back
sands and gravels
-low plasticity soil
-relatively high bearing capacity
-good for foundations
-good for drainage
silt
-sedimentary soil
-behaves as granular material does, but can be slightly plastic
-may be adequate for a foundation if tested to be stable, but better when mixed with other soils
clay
-cohesive (has tensile strength) soil
-plastic when wet
-unpredictable
-may be adequate for a foundation if tested to be stable, but better when mixed with other soils
organics
-vegetable/other decomposed matter
-poor base for a foundation
hardpan
unbroken mixture of clay, sand, and gravel; good for foundations
shale, slate
soft rock; second-highest bearing capacity
boulders
rocks that have broken off of bedrock
bedrock
solid rock that forms the earth's crust; highest bearing capacity
grain size and shape (soil test result)
in a soil test, determines shear strength, permeability, likely result of frost action, and compaction ability of granular soil
liquid and plastic limits (soil test result)
in a soil test, determines compaction and compressibility values for cohesive soil