Which soil has more specific gravity?

As such, the specific gravity of soil solids is actually an average of the specific gravity of all included soil particles. In general, the specific gravity tends to fall between 2.65 and 2.80, with coarser soils generally having lower specific gravities than finer soils.

What is the difference between coarse-grained soil and fine-grained soil?

The coarse-grained soil feels gritty when it is touched by the hand. The fine-grained soil feels smooth and sticky when touched by hand. The coarse-grained soil does not retain water and has more permeability. The fine-grained soil has very less permeability and it can retain water.

What is the specific gravity of fine-grained soil?

between 2.65-2.80
The Specific Gravity of soils is usually between 2.65-2.80 with finer soils having higher values than coarser ones.

Why specific gravity of clay is more than sand?

Inorganic clay generally ranges from 2.70 to 2.80. Soils with large amounts of organic matter or porous particles have specific gravities below 2.60….Standard Value of Specific Gravity of Sand.

What is the difference between the specific gravity of soil solids and its bulk specific gravity?

The term specific gravity of soil refers solely to the solid matter, while bulk density includes the pore volume of an aggregate. Bulk density is the ratio between soil weight to the total volume of the soil (solid particle volume plus void or porous volume). It is lower than specific gravity.

Why specific gravity of soil is determined?

DETERMINATION OF SPECIFIC GRAVITY. The knowledge of specific gravity is needed in calculation of soil properties like void ratio, degree of saturation etc. DEFINITION. Specific gravity G is defined as the ratio of the weight of an equal volume of distilled water at that temperature both weights taken in air.

What are the main index properties of coarse grained and fine grained soil How are these determined?

The main index properties of coarse grained soils are particle size and relative density where as for fine grained soil the main index properties are consistency and Atterberg’s limit.

Why pycnometer is used in coarse grained soil?

Pycnometer method is more suitable for coarsely grained soil rather than fine grained. Because entrapped air in soil mass can be easily removed in case of coarse grained soil.

What is the purpose of specific gravity?

Specific gravity can be used to determine if an object will sink or float on water. The specific gravity of water is equal to one. If an object or liquid has a specific gravity greater than one, it will sink. If the specific gravity of an object or a liquid is less than one, it will float.

What is the specific gravity of fine sand?

Specific gravity of fine aggregate (sand) is the ratio of the weight of given volume of aggregates to the weight of equal volume of water. The specific gravity of sands is considered to be around 2.65.

Why is bulk specific gravity important?

Bulk specific gravity of aggregate is important information for designing hot mix asphalt because it is used to calculate voids in mineral aggregate and voids filled with asphalt. Periodically, the aggregate is lightly tamped into a cone-shaped mold with 25 light drops of the tamper.

Why is the void ratio of fine-grained soil higher than coarse soil?

The reason is that the fine-grained soil has got very very finely divided particle which has got some chemical repulsions taking place. These chemical replulsions will not allow the particles to come closer that make the void ratio of the fine grained soils to be on the higher side compared to coarse grained soils.

What is the specific gravity of soil grain?

The specific gravity of soil grain is the mass ratio of the volume of dry soil in the pressure of air to the mass of the water of equal volume. Water is taken to be reference with a specific gravity of 1g/cm^3. The specific gravity of soil sample helps us to determine the void ratio, density and water content.

Why do fine grained particles have more specific gravity than coarse particles?

Fine grained particle have more specific gravity than coarse grained because they have less void or pore space. The volume occupied by unit weight of coarse particles is more than the unit weight of fine grained particles which decrease the density {density is inversely proportional to volume}.

What is the fine-grained soil?

The fine-grained soils cannot be seen by our naked eye. The fine-grained soil is basically divided into two groups which are silt and clay. The particles whose size ranges between 75 microns to 2 microns are known as Silt and the particles whose size smaller than 2 microns is known as clay.

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