Properties of first class bricks

Properties of first class bricks

• All bricks should be of first class of standard specifications.
• Bricks should be made of good earth completely burnt.
• Bricks should be of deep cherry red or copper color.
• Bricks should be regular in shape.
• Edges of bricks should be sharp.
• On being struck, bricks should emit clear ringing sound.
• Bricks should be free from cracks, chips, flaws and lumps of any kind.
• Bricks should not absorb water more than one sixth of its weight after one hour of immersing in water.
• Bricks should have a minimum crushing strength of 105 kg per square meter ( 1500 lbs per square inch).