What is relative density of sand?
The relative density of the sand is computed as the ratio of the difference between the maximum void ratio (emax) and the current void ratio (e) over the difference between the maximum and minimum void ratios (emax − emin) as shown in Eq.
What does relative density of soil indicate?
Relative density is the measure of compactness of cohesionless 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.
How do you find the relative density of sand?
The relative density of a soil is the ratio, expressed as a percentage, of the difference between the maximum index void ratio and the field void ratio of a cohesionless, free-draining soil; to the difference between its maximum and minimum index void ratios.
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.
Is code for relative density of sand?
DETERMINATION OF RELATIVE DENSITY OR DENSITY INDEX OF SAND (IS-2720-Part-15)
Why relative density is important?
Relative density tells us how heavy the substance is in comparison to water.It helps us to determine the density of an unknown substance by knowing the density of a known substance.It is very important in the accurate determination of density.
What is relative density of sand if the sand in situ is in its densest state?
If the sand in – situ is in its densest state, then the relative density of sand is. Zero.
What is bulk density of sand?
The approximate bulk density of sand that is commonly used in normal-weight concrete is between 1520-1680 kg/m3 (95-105 lb/ft3)
Is Code 2720 a part?
0.2 With a view to establishing uniform procedure for the determination of different characteristics of soils, Indian Standards on methods of test for soils ( IS : 2720 ) have been formulated in various parts. This part covers method of preparation of samples for the various laboratory tests covered in the standard.
Which has highest relative density?
Now, we know the relative density of all four given substances . The comparison of the relative density of all substances gives us that the relative density of mercury is maximum.
What is difference between relative density and density?
Density is the ratio between the mass and the volume of a body. Relative density, on the other hand, is the ratio between the density of an object (substance) and the density of some other reference object (substance) at some given temperature. Density is measured in, while relative density is dimensionless.
What is the density index value for the loosest soil?
A soil has porosity of 30%. Its voids ratio in the loosest and densest state is 0.35 and 0.92 respectively. What will be its density index?…Soil Mechanics Questions and Answers – Density Index and Relative Compaction.
| Relative Density (%) | Density Description |
|---|---|
| 0-15 | Very loose |
| 15-35 | Loose |
| 35-65 | Medium |
| 65-85 | Dense |
How is the density of in place Sand determined?
In-place density is determined using large scale sand replacement or water replacement methods (ASTM D 1556, 4914, and 5030) (1). Reclamation has had success with large sand cones. Contrary to construction control testing, large devices are not always needed.
How are soil properties related to relative density?
Various soil properties, such as penetration resistance, compressibility, friction angle, permeability and California bearing ratio, are found to have simple relationships with relative density. Relative density, therefore, gives a better indication of the strength and deformation of soil than its void ratio or density.
Which is better relative density or void ratio?
Relative density, therefore, gives a better indication of the strength and deformation of soil than its void ratio or density. Two sands having same relative density would show similar behavior under loads, although their void ratios may be different.
Which is the correct formula for relative density?
Relative Density, Dd, is expressed in terms of void ratio, e, as: Dd = e(max) – e (in-place)/ e (max)-e (min) Eqn (1) Using relative density as an indicator of sand condition, geotechnical engineers have performed many research studies of sand behavior by placing sands at differing relative densities.