Contents
How do you calculate CC and CU?
To find Cu and Cc. Cu – Uniformity coefficient. Cu = D60/D10. Cc – Coefficient of curvature.
What is co efficient of curvature?
It is the parameter estimated using the gradation curve through sieve analysis. The diameter taken from gradation curve for which the 10% particles are finer is known as effective size. …
What is D15 of soil?
D15 is the particle size (diameter) for the coarser material at which 15 percent of the material is finer. d15 is the particle size (diameter) for the finer material at which 15 percent of the material is finer.
What is uniformity coefficient of soil?
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 Cu soil classification?
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 coefficient of curvature?
The coefficient of curvature is a measure of gradation of particles and given by the following expression: Cc = (D30)2/D60.D10. Where, D60 = Size of the particle corresponding to 60% finer.
What are the three phases of soil?
Soil mass is generally referred to as three-phase system because it consists of solid particles , liquid, and gas.
How do you classify soil with CU and CC?
Coefficient of Cuvature (Cc) is a value that can be used to identify a poorly graded soil. A well graded soil has Cc between 1 and 3 as long as Cu is also greater than 4 for gravels and 6 for sands.
What is the use of this cu and CC?
For example, if you have 100 particles of diameter ranging from 1 mm to 100 mm, D60 is 61 mm (below which 60% of particles are there). Why do we find this? To find Cu and Cc. Cu – Uniformity coefficient. Cu = D60/D10. Cc – Coefficient of curvature. Cc = (D30)^2 / (D60) (D10). What is the use of this Cu and Cc?
When to use C C in sieve analysis?
The diameter taken from gradation curve for which the 10% particles are finer is known as effective size. When the value of C C is in between 1 and 3, the sand or gravel is said to be well graded. What does d10 mean?
What do Cu and CC refer in soil mechanics?
What do Cu & Cc refer in Soil mechanics? First, let us take a look at this grain size distribution curve. y axis – Percentage finer. From this curve, we can find the D60, D30 and D10 of a particular soil. D60 – 60 % of the soil particles are finer than this size. D30 – 30% of the particles are finer than this size.
What’s the difference between Cu and CC in sand?
For gravel, if Cu>4, it is well graded. For sand, if Cu>6, it is well graded. Cc is also greater than 1 ( equal to 1 is possible only by theoretical). For a well graded soil, Cc ranges between 1 to 3.