The advantages of
using fly ash brick are, the brick carries good comprehensive strength, provide
better thermal insulation than red clay bricks, cheaper compared to clay bricks
and are environment friendly. ... They replace clay which has all nutrients for
good agriculture.
Differentiate between
Clay Bricks and Fly Ash Bricks
The characteristics that differentiate between these bricks
are –
- Fly ash bricks are of cement color while the colour of Clay bricks differs from burnt red to light brown depending on the type of clay used for manufacture of the bricks.
- Fly Ash bricks are cast in moulds hence are always of uniform shape. Clay bricks are handmade causing slight difference in their shape and size.
- Fly Ash bricks have a very smooth finish hence plaster is not required on the bricks to create a smooth surface. Clay bricks require plastering.
- Clay bricks are more porous than Fly ash bricks.
- Fly ash bricks are lighter in weight and less costly than Clay bricks.
- Fly ash bricks are made of waste materials which come from the combustion of coal in thermal power plants. Clay bricks are made of clay which is collected from fertile land or the top soil. This is the prime reason that makes Fly ash bricks more preferable than Clay bricks.
|
FLYASH BRICK
|
NORMAL CLAY BRICK
|
|
Uniform pleasing colour like cement
|
Varying colour as per soil
|
|
Uniform in shape and smooth in finish
|
Uneven shape as hand made
|
|
Dense composition
|
Lightly bonded
|
|
No plastering required
|
Plastering required
|
|
Lighter in weight
|
Heavier in weight
|
|
Compressive strength is around 100 Kg/cm2
|
Compressive strength is around 35 Kg/cm2
|
|
Less porous
|
More porous
|
|
Thermal conductivity 0.90-1.05 W/m2 ºC
|
Thermal conductivity 1.25 – 1.35 W/m2 ºC
|
|
Water absorption 6-12%
|
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