Specific Gravity Lab Report Essay Example
SPECIFIC GRAVITY BY DENSITY BOTTLE
AIM OF THE EXPERIMENT:-
To determine the Specific Gravity of soil a particle passing through 4.75 mm IS sieve using Density bottle.
APPARATUS REQUIRED:-
i. Density bottle of 100 mm capacity.
ii. Desiccators.
iii. Balance with sensitivity of 0.01 gm.
THEORY:-
Specific Gravity is the ratio of the mass in air of given volume of dry soil solids to the mass of equal volume of distilled water at 4 o C. Or ratio of unit weight of soil solids to that of water. Let, in the figure
[pic]
M1 = Mass of empty density bottle.
M2 = Mass of density bottle + Soil grains.
M3 = Mass of empty density bottle + Soil grains + water.
M4 = Mass of empty density bottle + water.
[pic]
The value of specific gravity depends on the temperature hence its value is reported as standard temperature of 27 o C.
G (at 27 o C) = G (at t o C) * (SG of water at t o C / SG of water at 27 o C)
APPLICATION:
Specific gravity of the soil grains is an important property and is used to determine the voids ratio, porosity, and degree of saturation if density and water content are known.
Its value helps to some extent in identification and classification of solids. It gives an idea about the stability of soil as a construction material; higher value of specific gravity gives more strength for roads and foundation. It is used in comparing the soil particle size by means of hydrometer analysis. It is also used in estimation of critical hydraulic gradient in soil when sand boiling condition is being studied and in zero air void calculation in the compaction theory of solids.
Its value ranges as fallows:
i. Coarse grained soils: 2.6 to 2.7
ii. Fine grained soil: 2.7 to 2.8
iii. Organic soil: 2.3 to 2.5
PROCEDURE:
i. Take the Weight of clean and dry density bottle.
ii. Keep about 10 – 15 gm of oven dried cool soil in bottle and weight (M2).
iii.
AIM OF THE EXPERIMENT:-
To determine the Specific Gravity of soil a particle passing through 4.75 mm IS sieve using Density bottle.
APPARATUS REQUIRED:-
i. Density bottle of 100 mm capacity.
ii. Desiccators.
iii. Balance with sensitivity of 0.01 gm.
THEORY:-
Specific Gravity is the ratio of the mass in air of given volume of dry soil solids to the mass of equal volume of distilled water at 4 o C. Or ratio of unit weight of soil solids to that of water. Let, in the figure
[pic]
M1 = Mass of empty density bottle.
M2 = Mass of density bottle + Soil grains.
M3 = Mass of empty density bottle + Soil grains + water.
M4 = Mass of empty density bottle + water.
[pic]
The value of specific gravity depends on the temperature hence its value is reported as standard temperature of 27 o C.
G (at 27 o C) = G (at t o C) * (SG of water at t o C / SG of water at 27 o C)
APPLICATION:
Specific gravity of the soil grains is an important property and is used to determine the voids ratio, porosity, and degree of saturation if density and water content are known.
Its value helps to some extent in identification and classification of solids. It gives an idea about the stability of soil as a construction material; higher value of specific gravity gives more strength for roads and foundation. It is used in comparing the soil particle size by means of hydrometer analysis. It is also used in estimation of critical hydraulic gradient in soil when sand boiling condition is being studied and in zero air void calculation in the compaction theory of solids.
Its value ranges as fallows:
i. Coarse grained soils: 2.6 to 2.7
ii. Fine grained soil: 2.7 to 2.8
iii. Organic soil: 2.3 to 2.5
PROCEDURE:
i. Take the Weight of clean and dry density bottle.
ii. Keep about 10 – 15 gm of oven dried cool soil in bottle and weight (M2).
iii.