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SPECIFICATION FOR BURNT CLAY HOLLOW BRICKS USED FOR WALLS AND PARTITIONS

Reference

IS 3952-1988 – Specification for burnt clay hollow bricks for walls and partitions.

General Quality

o    Bricks shall be free from cracks and flaws and nodules of free lime.

o    Bricks shall have smooth rectangular faces with sharp corners

o    Bricks shall be of uniform in colour and texture.

o    Bricks shall be free from excessive winding or bowing.

Hollow Brick for Walls and Partitions
Hollow Brick for Walls and Partitions

 Dimensional Specification

Length (L), mm Width (W), mm Height (H), mm
190 90 90
290 90 90
290 140 90

Physical Requirements

Compressive Strength Minimum average compressive strength shall not be less than 3.5 N/mm2.

When tested for any individual brick, shall not fall below the minimum average compressive strength by more than 20%.

Water Absorption Shall not be more than 20% by weight
Efflorescence Shall have a rating of efflorescence not more than ‘Slight’

Types of Hollow Bricks

Types Face Type
Type A Bricks with both faces keyed for plastering or rendering
Type B Bricks with both faces smooth
Type C Bricks with one face keyed and one face smooth

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