BRICK 5 Flashcards
What are Bullnose bricks?
Bricks moulded with a rounded angle, one edge curved, used for rounded quoin.
What are Channel bricks
Bricks moulded to the shape of a gutter, used as drains.
What are Cownose bricks?
Bricks with two curved edges, moulded with a double bullnose,
What are Curved Sector bricks?
Bricks in the form of a curved sector, used in the construction of pillars, chimneys, etc
What are Hollow bricks?
Also known as cellular or cavity bricks, they weigh about 1/3rd of an ordinary brick and are used to reduce heat, sound, and damp transmission.
What is the maximum hollow area of Hollow bricks?
The maximum hollow area should not be greater than 50% of the total plane area.
How much faster are Hollow bricks laid compared to ordinary bricks?
Hollow bricks are laid almost 4 times faster than ordinary bricks.
What are the dimensions of Hollow bricks?
Size - 40 x 20 x 20 cm, Wall thickness - 20-25 mm.
What are Paving bricks?
Prepared from clay with a high percentage of iron, they offer better resistance to the abrasive action of traffic.
What is the IS code for Paving bricks?
: IS 3583.
What are Coping bricks?
Bricks made to suit the thickness of walls on which coping is to be provided to prevent the entry of water.
What are the different forms of Coping bricks?
Chamfer, half round, or saddle back.
What are Perforated bricks?
Bricks containing cylindrical holes, light in weight, and requiring less clay for preparation.
What is the IS code for Perforated bricks?
IS 2222.
What is the water absorption of Perforated bricks?
Less than 15%.
What is the compressive strength of Perforated bricks?
Greater than 7 N/mm².
What are Squint bricks?
A brick cut or moulded to an oblique angle, forming an angle other than a right angle in plan.
What is the key property of fire clay?
High temperature resisting capacity.
: What are the main constituents of good fire clay?
Alumina and silica.
What is the temperature range that High Duty Fire Clays can resist?
1482°C to 1648°C.
What is the temperature range that Medium Duty Fire Clays can resist?
1315°C to 1482°C.
What is the temperature range that Low Duty Fire Clays can resist?
Up to 870°C.
What are Fire Bricks made from?
Made from fire clay.
What is the color of Fire Bricks?
White or yellowish white.
What is the weight of Fire Bricks?
About 30 to 35 N.
What temperature can Fire Bricks resist?
Up to 1500°C
What are Fire Bricks used for?
Used for lining of kilns, ovens, chimneys, etc.
What is the compressive strength of Fire Bricks?
200 to 220 kg/cm².
What is the water absorption of Fire Bricks?
Varies from 5 to 10%.
What are the three types of Fire Bricks?
Acidic Brick, Basic Brick, and Neutral Brick.
What is used for acidic lining in Fire Bricks?
ACIDIC BRICK
Ordinary fire bricks and silica bricks.
What is used for basic lining in Fire Bricks?
BASIC BRICK
Magnesia bricks (70% MgO + 30% silica and alumina) and Dolomite bricks (carbonate of Ca and Mg).
What is used for neutral lining in Fire Bricks?
NEUTRAL BRICK
Chromite bricks and high alumina bricks.
What is the composition of Silica bricks?
Silica 95 to 97%, Lime 1 to 2%.
What temperature can Silica bricks withstand?
About 2000°C.
What is the compressive strength of Silica bricks?
15 N/mm².
