Cons. Tech 1 Bricks Present.

8/6/2019 Cons. Tech 1 Bricks Present.

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INTRODUCTION

To turn the clay into hard, durable

bricks, we have to cut and mold it into

rectangular shape which are then fired in an

industrial oven called a kiln at temperatures of

over 1000°C (1800°F). The bricks are also

known as fired clay bricks.



FIRED CLAY BRICKS

Fired clay bricks remain one of the most

enduring building materials known to the world

wide building industry. Some might argue that it

is also one of the most beautiful and that it adds

character to any building with its colour,

strength and texture. Clay brick dates as far back

as the Egyptian age and connects us with the

history of our ancestors.



PROPERTIES� Aesthatic appeal (looks interesting)

-different clay compositions, firing temperatures, or kilnatmosphere can lead to different colors.-the colours are permanent and will not fade in anyweather.

� Acoustic insulation- provides good sound insulation property due to itsdense structure.

� Bricks have an excellent fire rating.

� It is weatherproof .

� Bricks are very cheap because it takes about 10 percent of the total cost of a typical residential building.



PROPERTIES� Bricks are easy to handle (all have same rectangular

shape).

� Thermal insulation

-brick absorbs and releases heat slowly and thus

keep the house cool during day-time and warm

during night-time.

� Zero maintenance cost

-brick is termite proof



CONSTITUENTS

� Alumina- is main composition in almost every kind of clay-it shrinks and crack in drying-becomes very hard under the influence of heat-a good brick should contain 20% to 30% of alumina

� Silica-it is found in nearly all clays in uncombined state (assand)

-in combined form it exists in chemical compositionwith alumina (silicate of alumina)-it prevents cracking,shrinking, and warping of the rawbricks.-thus,it makes uniform shape of the bricks.

-a good brick should contain 50%-60% of silica



CONSTITUENTS� Lime

-a good brick have only a small quantity of lime that

not exceed 5%

-it should be present in very finely state because

even small particles with the size of a pin will cause

flaking on the brick.

-it prevents shrikage of the raw bricks

-the excess of lime cause the brick to melt and

hence it shape is lost

Cons. Tech 1 Bricks Present.

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