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  2. Mesh (scale) - Wikipedia

    en.wikipedia.org/wiki/Mesh_(scale)

    Although such information contains long lists of sieve sizes, in practice sieves are normally used in series in which each member sieve is selected to pass particles approximately 1/ √ 2 smaller in diameter or 1/2 smaller in cross-sectional area than the previous sieve. For example the series 80mm, 63, 40, 31.5, 20, 16, 14, 10, 8, 6.3, 4, 2.8 ...

  3. AASHTO Soil Classification System - Wikipedia

    en.wikipedia.org/wiki/AASHTO_Soil_Classification...

    Granular Materials (35% or less passing the 0.075 mm (No. 200) sieve) Silt - Clay Materials (>35% passing the 0.075 mm (No. 200) sieve) Group Classification

  4. Soil gradation - Wikipedia

    en.wikipedia.org/wiki/Soil_Gradation

    Calculating the coefficients of uniformity and curvature requires grain diameters. The grain diameter can be found for each percent of the soil passing a particular sieve. This means that if 40% of the sample is retained on the No. 200 sieve then there is 60% passing the No. 200 sieve. [1]

  5. Unified Soil Classification System - Wikipedia

    en.wikipedia.org/wiki/Unified_Soil...

    more than 50% retained on or above No.200 (0.075 mm) sieve: gravel > 50% of coarse fraction retained on No.4 (4.75 mm) sieve clean gravel <5% smaller than No.200 Sieve GW well-graded gravel, fine to coarse gravel GP poorly graded gravel gravel with >12% fines GM silty gravel GC clayey gravel sand

  6. Sieve analysis - Wikipedia

    en.wikipedia.org/wiki/Sieve_analysis

    A sieve analysis (or gradation test) is a practice or procedure used in geology, civil engineering, [1] and chemical engineering [2] to assess the particle size distribution (also called gradation) of a granular material by allowing the material to pass through a series of sieves of progressively smaller mesh size and weighing the amount of material that is stopped by each sieve as a fraction ...

  7. Grain size - Wikipedia

    en.wikipedia.org/wiki/Grain_size

    Grain size (or particle size) is the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials . This is different from the crystallite size, which refers to the size of a single crystal inside a particle or grain.

  8. Particle-size distribution - Wikipedia

    en.wikipedia.org/wiki/Particle-size_distribution

    The closer this value is to 1.0, the better the data fit to a hyperplane representing the relationship between the response variable and a set of covariate variables. A value equal to 1.0 indicates all data fit perfectly within the hyperplane. λ: Gas mean free path (cm) D 50: Mass-median-diameter (MMD). The log-normal distribution mass median ...

  9. Particle size - Wikipedia

    en.wikipedia.org/wiki/Particle_size

    Particle size is a notion introduced for comparing dimensions of solid particles (), liquid particles (), or gaseous particles ().The notion of particle size applies to particles in colloids, in ecology, in granular material (whether airborne or not), and to particles that form a granular material (see also grain size).

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