Uses of Bricks

 


Uses of Brick

Brick plays very important role in the field of civil engineering construction. Bricks are used as an alternative of stones in construction purpose. Here some main uses of construction brick are

Characteristics of Good Bricks

It is always desirable to use the best quality brick in constructions. Therefore, the Characteristics of a good brick must be investigated. Generally good bricks possesses following properties

ü Bricks should be uniform in color, size and shape. Standard size of brick should be maintained.

ü They should be sound and compact.

ü They should be free from cracks and other flaws such as air bubbles, stone nodules etc. with sharp and square edges.

ü Bricks should not absorb more than 1⁄5 of their own weight of water when immersed in water for 24 hours (15% to 20% of dry weight).

ü The compressive strength of bricks should be in range of 2000 to 5000 psi (15 to 35 MPa).

ü Salt attack hampers the durability of brick. The presence of excess soluble salts in brick also causes efflorescence. The percentage of soluble salts (sulphates of calcium, magnesium, sodium and potassium) should not exceed 2.5% in brunt bricks.

ü Brick should not change in volume when wetted.

ü Bricks should neither over-burnt nor under-brunt.

ü Generally, the weight per brick should be 6 lbs. and the unit weight should be less than 125 lbs. per cubic ft.

ü The thermal conductivity of bricks should be low as it is desirable that the building built with them should be cool in summer and warm in winter.

ü Bricks should be sound proof.

ü Bricks should be non-inflammable and incombustible.

ü Bricks should be free from lime pitting.

Lime Pitting of Bricks

If calcium carbonate is present in brick raw material, quicklime will be produced in the kiln. This quicklime, with the help of water, will form hydrated lime and the process expands sufficient.

Brick Tests Details - Quality Construction Work

List of Brick Tests

ü Absorption test

ü Compressive Strength Test (Crushing Strength Test)

ü Efflorescence Test (Presence of Soluble Salts)

ü Hardness Test

ü Impact Test

ü Dimension Tolerance Test

ü Shape and Size

ü Color Test

ü Soundness Test

ü Structure Test.

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