SPECIFICATION OF BURNT CLAY PERFORATED BUILDING BRICK(IS: 2222)

PERFORATED BRICK

Perforated Bricks contain cylindrical holes throughout their thickness, The axis of perforations can be vertical or horizontal. These bricks are light in weight, require less quantity of clay and drying and burning of these bricks is easy and economical. 

Uses

burnt clay perforated building bricks are used in building walls and partitions and where the reduction of dead load is required.

SPECIFICATION

Perforated Area

The area of perforations shall not exceed 30 to 45% of the area of face. In case of rectangular perforations, larger dimensions should be parallel to longer  side of the brick.

Dimension And Tolerance

Available Size

1) Modular Size:- 19 x 9 x 9 cm

2) Non-Modular Size:-  23 x 110 x 70 cm

Tolerance

Dimension           Tolerances

    (mm)                   (mm)

    70, 90              4 (less or more)

  110, 190          7(less or more)

     230              10(less or more)

(a) Dimension of perforation parallel to short side should not be more than 20 mm in case of rectangular projection and 25 mm in case of circular projection.

(b) Area of each perforation should not exceed 500 mm2.

Compressive Strength

Compressive strength of these bricks should be adequate to resist dead load of building which should not be less than 7.0 N/mm2.

Water Absorption

These bricks should absorb less water not more than 15 per cent.

Efflorescence

Efflorescence of these bricks should not be more than slight.

Warpage 

Warpage of perforated building bricks shall not exceed 3 per cent.

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