Introduction of bricks & their types

Introduction of Bricks

  • Brick is most ancient and most recognized building materials.
  • To develop brick, mould clay in square type blocks with identical sizes and then dry & burn these blocks.
  • Standard size of bricks vary from 190mm.*90mm.*90mm. Or 200mm.*100mm.*100mm.(with mortar)
  • Standard size -230mm.*110mm.*110mm. Or 230mm.*110.*75mm
  • Weight of a single brick belongs to 3.5Kg. (Approx)

Categorization of Bricks

1. Unburnt Bricks

  • The heat generated from sun light is used to dry these bricks as soon as the moulding process is completed.
  • The bricks are mostly found in temporary and low-priced construction work.

2. Burnt Bricks

  • Once moulding and drying process are finished, these bricks are burnt in a clamp or kiln.
  • These bricks are solid, strong, long lasting and applicable in permanent construction works.
  • These Bricks divided into 4 categories:- a) First Class Brick, b) Second Class Brick, c)Third Class Brick, d)Fourth Class Brick.

a) First Class Brick

  • The bricks are moulded through table
  • Properly burnt and regular in shape and size.
  • Edges are piercing and properly demarcated.
  • Consistent in colour.
  • Water absorption capacity should not surpass 20%
  • Lowest crushing strength is similar to 0.5 N/mm2.

Applications of First Class Brick

  • For pointing and uncovered face work.
  • Flooring and reinforced brick work.

b) Second Class Brick

  • These are moulded in ground
  • Perfectly burnt and the shape and size are uneven.
  • Edges are neither straight nor properly demarcated.
  • Inconsistent in colour.
  • Water absorption capacity does not surpass 22%
  • Lowest crushing strength=7 N/mm2.

Applications of Second Class Brick

  • Concealed masonry work enclosed with plaster.
  • Centering of reinforced brick work.

c) Third Class Brick

  • It is moulded in ground
  • Under-burnt and shape and size are inconsistent.
  • Light yellowish The colour is light yellow.
  • Edges are asymmetrical.
  • Water absorption capacity does not surpass 25%
  • Lowest crushing strength is 3.5 N/mm2.

Applications of Third Class Brick

  • Mostly useful for temporary building structure.

d) Fourth Class Brick

  • Burnt excessively.
  • Uneven in shape and size.
  • Colour is gloomy.
  • Solid and well-built.

Applications of Fourth Class Brick

  • Ballast of such bricks are applied for foundation and floor.

bricks type