SPECIAL BRICKS

1. SPECIALLY SHAPED BRICKS

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

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

4. PERFORATED BRICKS

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

REFRACTORY BRICKS

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

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

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

NEUTRAL BRICKS Chrome bricks Chrome-Magnesite bricks Forsterite bricks

DEFECTS OF BRICKS

Over burning Under burning Bloating Black core

Efflorescence Cracks Spots Blisters