BCM: Bricks & Brickwork

Below are the correct statements about FACING BRICKS; except?

• Facing bricks are selected purposely to give a pleasing finish

• The clay blend is particularly important to achieve the desired uniform color or multicolored

• No texture is required on the surface

• Used for most visual brickwork

What are the characteristics of ENGINEERING BRICKS?

• Porous, high water absorption, glossy surface finish

• Dense, vitreous, strong, durable, low water absorption, use low firing temperature

• Dense, high water absorption, yellow color, uneven surface finish

• Dense, vitreous, strong, durable, low water absorption, red or blue color

"Red bricks are obtained by burning at considerably

high temperatures".

Which ingredient suits the above statements?

• Alumina

• Magnesia

• Lime

• Iron

What is the amount of Alumina required for the brick's ingredient?

• 1-7%

• 20-30%

• 30-40%
• 5-10%

Choose the standard metric brick referred to BS EN 771-1 : 2003.

• 215 x 65 x

  100 mm

• 215 x 70 x

  96 mm

• 215 x 102 x

  70 mm

• 215 x 102.5 x

  65 mm

These ingredients are important to prevent bricks from shrinkage, except.

• Silica

• Lime

• Magnesia

What is the importance of FIRING in the manufacturing process of bricks?

• Firing helps in reducing the weight of the bricks
• Firing is done to make the bricks waterproof
• Firing is done to sinter or vitrify the clay

What is the importance of FIRING in the manufacturing process of bricks?

• Firing helps in reducing the weight of the bricks
• Firing is done to make the bricks waterproof
• Firing is done to sinter or vitrify the clay

"This defect is observed as a spongy swollen mass over the surface of burned bricks that is caused due to the presence of excess carbonaceous matter and sulfur in brick clay".

Choose the type of defect stated above.

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"This joint gives an improved appearance over a flush joint, with little reduction in its strength. Owing to the compressing of the joint and the superior bond, it has good weather resistance and is suitable for all grades of exposure".

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