DIFFERENT FORM OF BRICK ON THE BASIS OF THEIR SHAPE
Bricks can be classified on the basis of their geometry and shape. There are bricks in the form of round ended, bull nosed, perforated, coping, hollow, compass, cornice, cant, double cant, king closer, queen closer, engineering bricks etc. Every one of these also has a unique function and characteristic that allows you to have the right brick at the right place.
ROUND ENDED BRICK
Round ended brick are used to construct open drains.
BULL NOSED BRICK
A brick moulded with a rounded angle is termed as a bullnose. It is used for a rounded quoin and to construct open drains. A connection which is formed when a wall takes a turn is known as a quoin. The centre of the curved portion is situated on the long centre-line of brick.
CANT BRICK
The splay or cant bricks are made for jambs of doors and windows.
DOUBLE CANT BRICK
The double cant brick is used for octagonal pillars
CORNICE BRICK
Cornice bricks is used from architectural point of view.
COMPASS BRICK
A compass brick tapering in both directions along its length used to construction of furnaces.
PERFORATED BRICK
Perforated bricks contain cylindrical holes throughout their thickness. They may be circular, square rectangular or any other regular shape in cross-section. The distance between the side of brick and edge of perforation should not be less than 15mm. The distance between the edges of successive perforations should preferably be not less than 10mm. The water absorption after immersion for 24 hours in water should not exceed 15 percent by weight. The compressive strength of perforated bricks should not be less than 7 N/mm2 on gross area. These bricks are light in weight and they require less quantity of clay for their preparation. Perforated brick is well burned brick, but is not sound proof. The perforated bricks are used in the construction of panels for lightweight structures and multi-storeyed framed structures. countries like India, the bricks with perforations of about 30 to 45 per cent of the total area of the corresponding face of the brick would offer adequate thermal insulation property.
HOLLOW BRICK
These are also known as the cellular or cavity bricks. Such bricks have wall thickness of about 20mm to 25mm. They are prepared from special homogeneous clay. These are about l/3rd the weight of normal bricks and are sound and heat proof, but are not suitable where concentrated loads are expected. They are used in the construction of partitioning.
COPING BRICK
Top most bricks course of parapets is made with coping bricks. These drain off the water from the parapets. Brick is used at plinth level and for door and window jambs.
QUEEN CLOSER BRICK
When the brick is cut along the length, it is called queen closer and when cut at one end by half header and half stretcher, it is known as king closer.
KING CLOSER BRICK
when the brick cut at one end by half header and half stretcher, it is known as king closer.
PURPOSE MADE BRICK
In order to achieve certain purpose, these types of bricks are made.
Engineering Brick
The engineering bricks having adiquate strength, 0 to 80 N/mm2 and water absorption about 4 to 6 per cent, can be prepared from specially selected earth for use in constructions where high durability, compression strength and adequate resistance to sudden shocks are required.
Engineering bricks offer excellent load bearing capacity damp-proof characteristics and chemical resisting properties. These bricks are used in specific projects and can cost more than regular or traditional bricks.
Other Brick
The splay or cant bricks are made for jambs of doors and windows. The arch bricks are made of wedge shape to keep mortar joint of uniform thickness. The ornamental bricks are prepared for corbels, cornices, etc.
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DIMENSION TEST OF BUILDING BRICK(IS: 1077)
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