USCchart - Give typical names: indicate ap- proximate...

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Unformatted text preview: Give typical names: indicate ap- proximate percentages of sand and gravel: maximum size: angularity, surface condition, and hardness of the coarse grains: local or geological name and other pertinent descriptive information and symbol in parentheses. For undisturbed soils add infor- mation on stratification, degree of compactness, cementation, moisture conditions and drain- age characteristics. Example: Well graded gravels, gravel- sand mixtures, little or no fines Poorly graded gravels, gravel- sand mixtures, little or no fines Silty gravels, poorly graded gravel-sand-silt mixtures Clayey gravels, poorly graded gravel-sand-clay mixtures Well graded sands, gravelly sands, little or no fines Poorly graded sands, gravelly sands, little or no fines Silty sands, poorly graded sand-silt mixtures Clayey sands, poorly graded sand-clay mixtures GW GP GM GC SW SP SM SC Wide range of grain size and substantial amounts of all intermediate particle sizes Predominantly one size or a range of sizes with some intermediate sizes missing Non-plastic fines (for identification procedures see ML below) Plastic fines (for identification pro- cedures see CL below) Wide range in grain sizes and sub- stantial amounts of all intermediate particle sizes Predominantely one size or a range of sizes with some intermediate sizes missing...
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