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What type of grain size is fine?

Particle size (grain size)

φ scale Size range (metric) Aggregate name (Wentworth Class)
1 to 0 ½–1 mm Coarse sand
2 to 1 ¼–½ mm Medium sand
3 to 2 125–250 µm Fine sand
4 to 3 62.5–125 µm Very fine sand

What are the standard sieve sizes?

Particle Size Conversion Table

Sieve Designation Nominal Sieve Opening
Standard Mesh inches
0.500 mm No. 35 0.0197
0.420 mm No. 40 0.0165
0.354 mm No. 45 0.0139

What is meant by fat clay?

A cohesive and compressible clay of high plasticity, containing a high proportion of minerals that make it greasy to the feel. It is difficult to work when damp, but strong when dry. Compare with: lean clay.

What is difference between sand silt and clay?

The largest, coarsest mineral particles are sand. These particles are 2.00 to 0.05 mm in diameter and feel gritty when rubbed between your fingers. Silt particles are 0.05 to 0.002 mm and feel similar to flour when dry. Clay particles are extremely fine — smaller than 0.002 mm.

What is low plasticity clay?

Soils that plot above the “A” line on ENG Form 4334 and. have LLs ranging from 10 to 30 and PIs ranging from 4 to 7 are called low plasticity clay/silt mixtures. types of soils are represented by the symbol CL-ML, indicating that they are low plasticity soils comprised of a.

How do you increase plasticity in clay?

Clay artists tend to think of aging clay as a process of improving the clay’s plasticity by storing it for a long time. Clay that is mixed with a minimum amount of water (so called dry mixed) behaves this way and exhibits increasing plasticity for the first two to four weeks of storage as it becomes fully wetted.