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10 Cards in this Set
- Front
- Back
sands and gravels
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-low plasticity soil
-relatively high bearing capacity -good for foundations -good for drainage |
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silt
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-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 |
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clay
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-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 |
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organics
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-vegetable/other decomposed matter
-poor base for a foundation |
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hardpan
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unbroken mixture of clay, sand, and gravel; good for foundations
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shale, slate
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soft rock; second-highest bearing capacity
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boulders
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rocks that have broken off of bedrock
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bedrock
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solid rock that forms the earth's crust; highest bearing capacity
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grain size and shape (soil test result)
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in a soil test, determines shear strength, permeability, likely result of frost action, and compaction ability of granular soil
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liquid and plastic limits (soil test result)
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in a soil test, determines compaction and compressibility values for cohesive soil
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