Important Test For Bricks
Brick is one of the most essential components of any form of building construction work. Here we are discussing some tests on bricks to justify the brick’s quality. They are as follows:
1) Absorption: First and foremost, a brick is taken and it is weighed dry. It is submerged in water around 16 hours. It is measured again and the variation in weight specifies the quantity of water soaked up by the brick. It should not go above 20 per cent of weight of dry brick.
2) Compressive Strength of Bricks: The crushing strength of a brick is brought to light by locating it in a compression testing machine. It is pressed until it cracks.
3) Hardness test on bricks: In this test, a scratch is made on brick surface with the assistance of a finger nail. If there is no impression left on the surface, the brick is adequately rigid.
4) Presence of Soluble Salts: The soluble salts, give rise to efflorescence on the brick’s surface. To trace the presence of soluble salts in a brick, it is dipped in water for 24 hours. It is then taken out and permitted to dry in shade.
5) Shape and size: In this test, a brick is closely reviewed. It should be of standard size and its shape should be of standard size and its shape should be truly rectangular having sharp edges. For this particular purpose, 20 bricks of standard size (225 mm x 112.5 mm x 75 mm) are selected randomly and they are stacked according to the length, along with both width and height.
6) Soundness test on brick: In this test, the two bricks are selected and they are stuck together. One important thing to keep in mind that the bricks should not break and a clear ringing sound should be generated.
7) Structure of a brick: A brick is broken and its structure is examined. It should be identical, condensed and free from any faults such as holes, lumps, and so on.