Note3-Phase relations

Note3-Phase relations - Topic II: Primitive, Quantitative...

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Topic II: Primitive, Quantitative escription of Soils Description of Soils Objectives Compute the masses (or weights) and olumes of the ree ifferent phases volumes of the three different phases Present volume-weight characteristics
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Topic II: Primitive, Quantitative escription of Soils Description of Soils - Phase diagram - Three Volumetric ratios - Water content and unit weight - Calculation of the masses (or weights) and volumes of the three different phases Reading: Sections 3.1 to 3.5 of the text
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Three Phases in Soils Phase diagram
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Definitions (1) Void ratio e is the measure of void volume v V e V = s (given in decimal, e.g., 0.65) (2) Porosity n is also a measure of void volume Phase diagram v V n = (1 ) 1 s Ve e n e == ++ t V s (given in percent; Range 0~100%)
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Typical Values of e
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Definitions (3) Degree of Saturation Sr is the percentage of the void volume filled by water 100% w r v V S V (given in percent 85%, 32%) hase diagram Range: 0 - 100% Phase diagram g Dr y Saturated
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Definitions (4) Water content w is a measure of water present in the soil 100% w s M w M Expressed as percentage.
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Note3-Phase relations - Topic II: Primitive, Quantitative...

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