In this topic, we will discuss Engineering Bricks.
Engineering brick are of two types
Class A and
The more widely used Class B.
Engineering bricks are used traditionally where a strong durable brick is required. Engineering bricks must have the high compressive strength and low water absorption. So the Engineering bricks are sold for their physical characteristics and not for their appearance.
Engineering bricks are not likely to have been inspected for minor chips or color as would normally be the case with a smooth red or blue facing brick.
in certain situations, Class A type engineering bricks can be used as a damp proof course brick and must have a compressive strength greater than 125N/mm^2 and a water absorption of less than 4.5 percentage.
Class B engineering bricks are used where a compressive strength in excess of 75N/mm^2 and a water absorption of less than 7 percent.
Engineering bricks are less uniform than facing bricks. Class A engineering bricks are less porous than class Bs.
Class B Engineering bricks have lower compression strength and higher water absorption and are used where strength and low water porosity resistance is needed.
In the British Standard BS 6100, clay Engineering bricks are defined as:
‘brick sized fired clay units having a dense and strong semi-vitreous body, conforming to defined limits for water absorption and compressive strength.’
Engineering bricks were traditionally used in civil engineering. These bricks were useful for damp courses and structural design. A common type of engineering brick is the Accrington brick; it is an iron-hard engineering brick
Engineering BRICK SPECIFICATION
Brick Type: Engineering
Cement Content : 350 kg/m³
Crushing Strength: 50-55 N/mm²
Density :2200 – 2350 kg/m³
Water Absorption: 4-6%
Weight per Brick: 3.2 kg
Thermal Conductivity: 1.2 w/m²k
Drying Shrinkage: After 24 hrs 0.03-0.04%
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