PE-03-Classify

PE-03-Classify - 03 Classification of Soils*01 Determine...

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03- Classification of Soils *01. Determine the percentage of each of the four grain sizes. *02. Coefficients of uniformity and curvature of granular soils. *03. Classify two soils using the USCS. *04. Manufacturing a “new” soil from two unacceptable soils. *05. Use Casagrande A-chart to classify a soil via USCS. *06. Identify a very highly plastic soil. *07. Find the Activity number of a clay. *08. Classify a soil comparing USCS with AASHTO. *09. Classify a soil comparing USCS with AASHTO. *10. Classify five soils using both USCS and AASHTO. *11. Find the fine’s portion particle size with a hydrometer. *12. Using a hydrometer to classify the fines portion of a soil. *13. Compare the relative density versus the relative compaction. **14. Find the range of relative densities D r for a granular soil. **15. Relative densities of quartzitic versus calcareous sands. **16. The theoretical minimum voids ratio of uniform sand. Symbols for the Classification of Soils C c Coefficient of curvature (also known as coefficient of gradation). C u Coefficient of uniformity. RC Relative compaction. D x Diameter of the grains (at % finer by weight). D r Relative density of a granular soil. e Voids ratio. e min Minimum voids ratio. e max Maximum voids ratio. I P Index of plasticity (also referred to as PI, plasticity index). K Constant of the yield value. LL Liquid limit. PL Plastic limit. SL Shrinkage limit. V Volume of the soil sample. W Weight of the soil sample. γ d(min) Dry unit weight in loosest condition (voids ratio e max ). γ d In-situ dry unit weight (voids ratio e ). γ d(max) Dry unit in densest condition (voids ratio e min ) 60

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The Unified Soils Classification System: GROUP SYMBOLS TYPICAL NAME 13 4 GW Well-graded gravels & gravel- sand mixtures, little or no fines GP Poorly-graded gravels & gravel- sand mixtures, little or no fines GM Sitly gravels, gravel-sand-silt mixtures GC Clayey gravels, gravel-sand-clay mixtures SW Well-graded sands & gravelly sands, little or no fines SP Poorly-graded sands & gravelly sands, little or no fines SM Sitly sand, sand-silt mixutres SC Clayey sands, sand-clay mixtures GROUP SYMBOLS TYPICAL NAME 4 Dry strength (crushing characteristic s) Dilatancy (reaction to shaking) Toughness (consistency near PL) ML Inorganic silts, very fine sands, rock flour, silty or clayey fine sands None to slight Quick to Slow None CL Inorganic clays of low to medium plasticity gavely clays, sandy clays, silty clays, lean clays Medium to high None to very slow Medium OL Organic silts & organic silty clays of low plasticity Slight to medium Slow Slight MH Inorganic silts, micaceous or diatomaceous fine sands or silts, elastic silys Slight to medium Slow to none Slight to medium CH Inorganic clays of high plasticity, fat clays High to very high None High OH Organic clays of medium to high plasticity, organic silts Medium to high None to very slow Slight to medium PT Peat & other highly organic soils MAJOR DIVISIONS FIELD IDENTIFICATION PROCEDURES (excluding particles larger than 75mm &
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PE-03-Classify - 03 Classification of Soils*01 Determine...

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