1. SPECIAL BRICKS

2. 1. SPECIALLY SHAPED BRICKS

3. Bull – Nosed bricks – Quoin
Cant or plinth bricks – Slope 45
Circular bricks – Towers, wells
Squint bricks – Acute and Obtuse
Cornice bricks
Coping bricks
Paving bricks

4. 2. BURNT CLAY FACING BRICKS 3. HEAVY CLAY FACING BRICKS

5. 4. PERFORATED BRICKS

6. 5. BURNT CLAY HOLLOW BRICKS 6. SAND LIME BRICKS 7. SEWER BRICKS 8
5. BURNT CLAY HOLLOW BRICKS 6. SAND LIME BRICKS 7. SEWER BRICKS 8. ACID-RESISTANT BRICKS

7. REFRACTORY BRICKS

8. REFRACTORY BRICKS Heat Resisting material
Thermal insulation & conduction
Properties
Withstand high temperature
Thermal shocks
Withstand Abrasion
Chemically inactive
Impermeable
Low electrical conductivity

9. ACID BRICK FIRE BRICKS Silica 50 to 75% Alumina 20 to 40%
SILICA BRICKS
Silica 95%
Lime 1 to 2%

10. BASIC BRICKS MAGNESITE BRICK Magnesia – 85% Calcium oxide – 25%
Silica – 5%
DOLOMITE BRICK
Calcium dolomite
BAUXITE BRICK
Alumina & Iron oxide

11. NEUTRAL BRICKS
Chrome bricks
Chrome-Magnesite bricks
Forsterite bricks

12. DEFECTS OF BRICKS

13. Over burning
Under burning
Bloating
Black core

14. Efflorescence
Cracks
Spots
Blisters