Any material that we use in building construction has some
properties like density,specific gravity, its unit of measurement and their mixing
ratio etc. we will discuss them in the tables given below :-
Density
It is defined as the ratio of mass and volume is called density. It is measures in kg/m3. In
below table we will discuss density of some building materials. The symbol of density is row (p)
below table we will discuss density of some building materials. The symbol of density is row (p)
Density of various building materials
|
S.NO
|
Name of material
|
Density in kg/m3
|
|
1.
|
CEMENT
|
1440
|
|
2.
|
LIME
|
640
|
|
3.
|
CONCRETE(P.C.C)
|
2400
|
|
4.
|
CONCRETE (R.C.C)
|
2500
|
|
5.
|
STEEL
|
7850
|
|
6.
|
BRICK
|
1500-1800
|
|
7.
|
ASPHALT
|
721
|
|
8.
|
LEAD
|
11400
|
|
9.
|
COPPER
|
8950
|
|
10.
|
IRON
|
7850
|
|
11.
|
GLASS
|
2580
|
|
12.
|
SOIL
|
1800-2000
|
|
13.
|
SILT
|
2100
|
|
14.
|
ROCKS
|
2600-2800
|
|
15.
|
WOOD
|
400-700
|
|
16.
|
AIR
|
1.2
|
If the density of any building material is high its
indicates that the molecular particles present in it are full compacted and if
the density of any building material is less its indicates that it’s not a
dense structure.
indicates that the molecular particles present in it are full compacted and if
the density of any building material is less its indicates that it’s not a
dense structure.
Why wooden float on water
As you know the floating properties also depend upon the
density of a building materials. Suppose the density of a material is less than
the density of water it will be float on the surface and if the density of any material
is greater than water then it will be drowned or sink in water.
density of a building materials. Suppose the density of a material is less than
the density of water it will be float on the surface and if the density of any material
is greater than water then it will be drowned or sink in water.
Example
The density of a wood
is about 400 to 700 kg/m3 and the density of water is 1000 kg/m3 because of which the wood
floats in water. Another example: Density of steel is 7850 kg/m3
that is too much of the density of water, so it gets drowned or sink in water.
is about 400 to 700 kg/m3 and the density of water is 1000 kg/m3 because of which the wood
floats in water. Another example: Density of steel is 7850 kg/m3
that is too much of the density of water, so it gets drowned or sink in water.
Specific Gravity
Specific Gravity :- It is the ratio of the density of a substance to the density of the reference substance. In case of mass specific gravity is the ratio of the mass of a substance to the mass of the reference substance. Specific gravity is a dimensionless quantity or no unit of measurement and measured in numbers
|
S.no
|
Name of material
|
Specific gravity
|
|
1.
|
Mercury
|
13.6
|
|
2.
|
Pure water
|
1
|
|
3.
|
Sea water
|
1.02
|
|
4.
|
Linseed oil
|
0.9
|
|
5.
|
Gravels
|
1.9
|
|
6.
|
Sand
|
2.6 to 2.8
|
|
7.
|
Silt
|
2.4 to 2.92
|
|
8.
|
Organic clay
|
1.98
|
|
9.
|
Inorganic clay
|
2.6 to 2.8
|
|
10.
|
LDPE Sheet
|
0.92
|
|
11.
|
HDPE Sheet
|
0.95
|
|
12.
|
Brick
|
1.98
|
|
13.
|
Milk
|
0.93
|
|
14.
|
Glass
|
2.58
|
|
15.
|
Cement
|
3.15
|
|
16.
|
Iron
|
7.7
|
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