WATER ABSORPTION TEST OF BURNT CLAY HOLLOW BRICKS

REFERENCE

IS-3952-1988-Specification for the burnt clay hollow bricks used for walls and partition

To determine the water absorption of burnt clay hollow bricks used for walls and partitions.

Name	Capacity
Balance	Sensitive to 0.1% of mass of specimen
Oven	110 to 115⁰C

Dry the specimen in an oven maintained at a temperature of 110⁰C to 115⁰C, until it attains a constant mass.
After brick dried completely, remove it from oven and cool it to room temperature.
Weigh the brick and record its weight as W₁.
After weighing the brick immerse it in water completely for a period of 24 hours.
After 24 hours of immersion, remove the specimen from water, wipe off the surface water using a damp cloth.
Weigh the wet brick and record its weight as W₂. Weighing of the brick must be completely within 3 minutes after removing the brick from water.

Calculate the percentage of water absorption using the following formula.

Water Absorption = [(W₂-W₁)/W₁]*100

Where

W₂ = Weight of soaked brick

W₁ = Weight of dry brick

The average value of 6 specimens is calculated and reported as the water absorption of the lot.