A wide array of tests is conducted on bricks to ascertain their quality for the purpose of construction. Brick testing is carried out in the laboratory as well as at the construction site.
Bricks are arguably one of the oldest and most vital construction materials due to their strength, reliability, and durability.
The tests that are needed to determine the suitability of bricks for construction work are discussed below.
1. Absorption test
This test is conducted on bricks to know the total amount of moisture that is absorbed by the brick under extreme conditions. During this test, a dry brick is taken and weighed. Post weighing, the brick is placed in water for 24 hours. After this, the wet brick is weighed. The difference in the weight of the dry brick and the wet brick is calculated which gives the amount of water absorption. For a high-quality brick, the amount of water absorption must not exceed 20% of the dry brick weight.
2. Crushing or compressive strength test
The crushing strength is determined by placing a brick in a compression testing machine that applies pressure on the brick until it breaks. The pressure at which the brick shatters should exceed a minimum of 3.50 N/mm2. Any value lower than that indicates that the brick is not suitable for construction.