When the soil is in loosest state its density index is?
Table of Contents
- 1 When the soil is in loosest state its density index is?
- 2 What is the density index of soil?
- 3 What does a density index indicate?
- 4 Why relative density is not applicable to cohesive soil?
- 5 Why relative density is important?
- 6 When the soil mass is not fully saturated the voids present in the soil mass are filled by?
- 7 What is the importance of the void ratio in soil mechanics?
When the soil is in loosest state its density index is?
∴ When the natural state of the cohesionless soil is in its loosest form then the relative density will be equal to 0.
When the soil is in the loosest form density index is zero and its relative compaction RC is?
Explanation: The relative compaction Rc is defined as the ratio of dry density γd of soil to its dry density corresponding to most compact state γd,max. Rc = γd/γd,max. Rc=80\%….Soil Mechanics Questions and Answers – Density Index and Relative Compaction.
| Relative Density (\%) | Density Description |
|---|---|
| 85-100 | Very Dense |
What is the density index of soil?
Relative density or density index is the ratio of the difference between the void ratios of a cohesionless soil in its loosest state and existing natural state to the difference between its void ratio in the loosest and densest states.
What is the range of relative density for loose soil?
2. Test Procedure
| Relative Density | State of Compactness |
|---|---|
| 0-15 | Very loose |
| 15-35 | Loose |
| 35-65 | Medium Dense |
| 65-85 | Dense |
What does a density index indicate?
The density index indicates by how much the sample which hardened in a vacuum is lighter than the one hardened under atmospheric pressure and can be used as direct meaure for the melt water content.
What does density index indicate?
Why relative density is not applicable to cohesive soil?
This term is not applicable to cohesive soil because of uncertaintities in the laboratory determination of the voids ratio in the loosest state of the soil (emax). When the natural state of the cohesionless soil is in its loosest form, e = emax and hence ID = 0.
Can relative density of soil negative?
Negative values of relative density usually result if the layers of uniform soils are mixed together. The trends of the data indicate that alluvial soils have relative densities which range from 20 to 70\%. The data indicate that some uniform gravel alluvium can have lower relative densities than the sand.
Why relative density is important?
Relative density can also help to quantify the buoyancy of a substance in a fluid or gas, or determine the density of an unknown substance from the known density of another. Relative density is often used by geologists and mineralogists to help determine the mineral content of a rock or other sample.
When the soil is fully saturated there is no?
2. When the soil is fully saturated, then there are no air voids present in it. Explanation: The air voids get filled with water leaving no air voids when the soil is fully saturated.
When the soil mass is not fully saturated the voids present in the soil mass are filled by?
Soil mass is generally a three phase system as it contains soils solids along with water and air. The space covered by water and air in the soils mass is called voids. These voids are sometimes filled completely with water and sometime by water and air.
The density index is defined as the ratio of the difference between the voids ratio of the soil in its loosest state emax and its natural voids ratio e to the difference between the voids ratios in the loosest and densest states: e = natural voids ratio of the deposit. This term is used for cohesionless soil only.
What is relative density in soil mechanics?
Relative density is the proportion of the difference between void ratios of cohesionless soil in its loose state and natural state to difference between the void ratio of loose state and densest states of soil. In another word, relative density is a function of void ratio and is expressed as: When soil is very loose, e= e max and D=0.
What is the importance of the void ratio in soil mechanics?
It helps to determine the closeness of soil solid in soil relative to the void ratio. Void ratio cannot be measured directly so the convenient way of measuring relative density is in term of dry weight which can be measured easily. Thus, this equation is used for determining relative density of a deposit in natural state.
What is the importance of soil density in geography?
It helps us in determining the maximum and minimum densities of soil. It helps to determine the closeness of soil solid in soil relative to the void ratio. Void ratio cannot be measured directly so the convenient way of measuring relative density is in term of dry weight which can be measured easily.