Engineering brick
Encyclopedia
Engineering bricks are a type of brick
Brick
A brick is a block of ceramic material used in masonry construction, usually laid using various kinds of mortar. It has been regarded as one of the longest lasting and strongest building materials used throughout history.-History:...

 used where strength, low water porosity or acid (flue gas) resistance are needed.

Clay Engineering bricks are defined in British Standard BS 6100 ‘Glossary of building and civil engineering terms’ as ‘brick sized fired clay units having a dense and strong semi vitreous body,
conforming to defined limits for water absorption and compressive strength.’

Stronger and less porous engineering bricks (UK Class A) are usually blue due to the higher firing temperature whilst class B are usually red.

Class A bricks have a strength of 125N/mm² and water absorption of less than 4.5%.

Class B bricks have a strength greater than 75N/mm² and water absorption of less than 7%

Engineering bricks can be used for damp-proof courses.

Accrington brick
Accrington brick
Accrington bricks, or NORIs were a type of iron hard engineering brick, produced in Huncoat, Accrington, Lancashire, England from 1887 to 2008...

is one type of EB.
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