Readers ask: What Is Cc And Cu 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.

How do you find CU and CC in sieve analysis?

Cu – Uniformity coefficient. Cu = D60/D10. Cc – Coefficient of curvature. Cc = (D30)^2 /(D60)(D10).

What is coefficient of curvature CC?

The coefficient of curvature is a measure of gradation of particles and given by the following expression: C_c = (D₃₀)2/D₆₀.D₁₀. Where, D₆₀ = Size of the particle corresponding to 60% finer.

What is coefficient of uniformity?

uniformity coefficient (u-ni-form’-i-ty). A numerical expression of the variety in particle sizes in mixed natural soils, defined as the ratio of the sieve size through which 60% (by weight) of the material passes to the sieve size that allows 10% of the material to pass.

What is CC and CU?

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.

What is CU in geotechnical engineering?

Uniformity Coefficient (Cu) which is a measure of the uniformity of grain size in the soil and is defined as the ratio of the 60% finer size (D60) to D10.

What is the CC and Cu value for the well graded sand SW )?

A sand is well graded if Cu > 6 and Cc = 1-3. A gravel is well graded if Cu > 4 and Cc = 1-3. For the grain size distribution curve shown in Fig. 3.1, D10 = 0.013 mm, D30 = 0.47 mm, D60 = 7.4 mm, Cu = 569 and Cc = 2.3.

What is D10 in sieve analysis?

The effective size of a given sample of sand is the particle size where 10% of the particles in that sample (by weight) are smaller, while 90% are larger. Usually this is denoted as the D10. The size distribution is represented by the Uniformity Coefficient, which enables you to see how well graded your sand sample is.

What is D10 size?

Take the report in the article “How To Read The Report of Particle Size Analysis?” for example, D10 is 2.557um, and D90 is 46.88 μm. The two sizes, D10 and D90, enclose the range of particle sizes of the sample powders. The particle size exceeds this range can be ignored, because of the small amount of particles.

What is Liquidity Index?

The liquidity index calculates the days required to convert a company’s trade receivables and inventory into cash. The index is used to estimate the ability of a business to generate the cash needed to meet its current liabilities. It is commonly used by credit analysts to evaluate the creditworthiness of customers.

What is the size of medium sand?

Sand is commonly divided into five sub-categories based on size: very fine sand (1/16 – 1/8 mm), fine sand (1/8 mm – 1/4 mm), medium sand (1/4 mm – 1/2 mm), coarse sand (1/2 mm – 1 mm), and very coarse sand (1 mm – 2 mm). These sizes are based on the Φ sediment size scale, where size in Φ = -log base 2 of size in mm.

What is D10 D50 and D90?

D10: The portion of particles with diameters smaller than this value is 10% D50: The portions of particles with diameters smaller and larger than this value are 50%. Also known as the median diameter. D90: The portion of particles with diameters below this value is 90%.

What is a D50 in particle size?

Particle Size Distribution D50 is also known as the median diameter or the medium value of the particle size distribution, it is the value of the particle diameter at 50% in the cumulative distribution. It is one of an important parameter characterizing particle size.

How do you interpret sieve results?

When you hear the term test sieve analysis results, it is referring to the distribution of particles in a given sample. This can be interpreted by analyzing the retention of particles throughout a sieve stack or the amount of material that passes through each sieve.