## What is the grain size distribution curve?

This curve is obtained from the result of sieve size analysis and it is plotted for grain or particle size versus percentage finer. This curve is otherwise called gradation curve. It is used to know about the gravel and sand and whether it if poorly graded or well graded.

What is CU and CC in sieve analysis?

The uniformity coefficient (Cu) and the coefficient of gradation (Cc) are the measures of soil gradation. These coefficients help to classify the soil as well graded or poorly graded ones.

Why do we do grain size analysis?

Grain size analysis is a typical laboratory test conducted in the soil mechanics field. The purpose of the analysis is to derive the particle size distribution of soils. Sieve Grain Size Analysis is capable of determining the particles’ size ranging from 0.075 mm to 100 mm.

### What is the purpose of a particle size distribution curve?

The particle-size distribution curves can be used for comparing different soils. Also, three basic soil parameters can be determined from these curves, and they can be used to classify granular soils. Them parameters are: Effective size.

How do you find the effective particle size?

Effective particle size can be determined using sieves.

1. Arrange the sieves one on top of the other beginning with the 10 mm sieve on top and the 0.01 mm sieve on the bottom.
2. Pour the dirt until the top sieve (10 mm) is filled and shake all four sieves for 10 minutes.

What is meant by grain size distribution?

The particle-size distribution (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or a mathematical function that defines the relative amount, typically by mass, of particles present according to size. particles into the PSD that is then called a grain size distribution.

#### How do you calculate Cu and CC?

To find Cu and Cc. Cu – Uniformity coefficient. Cu = D60/D10. Cc – Coefficient of curvature.

What is a grain size distribution?

Grain Size Distributions. A grain size distribution plot is a special purpose graph generally used to depict the results of a sieve analysis, commonly known as a “gradation test”. The sieve analysis determines the gradation (the distribution of aggregate particles, by size, within a given sample) in order to determine compliance with design,…

What is the grain size of soil?

The grain size of soil particles and their aggregate structures affect the ability of a soil to transport and retain water, air, and nutrients. Grain size is classified as clay if the particle diameter is <0.002 mm, as silt if it is between 0.002 mm and 0.06 mm, or as sand if it is between 0.06 mm and 2 mm.

## What is the grain size of gravel?

Gravel is small, loose, rock particles. It is any loose rock that is larger than 2 mm (0.079 in) in its smallest dimension (about 1/12 of an inch) and no more than 64 mm (2.5 in). Small gravel is composed of granules (>2 to 4 mm/0.079 to 0.16 in). Large gravel is called pebbles (>4 to 64 mm/0.16 to 2.5 in).

What is fine grain size?

In steels the term fine grain sometimes refers to grain sizes below 100nm or .1 micron. From my education the .1 micron boundary usually refers to the nanostructure boundary and this size range is below the optical microscopy boundary.

What is the grain size distribution curve? This curve is obtained from the result of sieve size analysis and it is plotted for grain or particle size versus percentage finer. This curve is otherwise called gradation curve. It is used to know about the gravel and sand and whether it if poorly graded or well…