WATER ABSORPTION TEST OF BURNT CLAY HOLLOW BRICKS

REFERENCE

- 3952 - 1988规范的烧粘土霍尔ow bricks used for walls and partition

Objective

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

Equipment

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

Procedure

1. Dry the specimen in an oven maintained at a temperature of 110⁰C to 115⁰C, until it attains a constant mass.
2. After brick dried completely, remove it from oven and cool it to room temperature.
3. Weigh the brick and record its weight asW₁.
4. After weighing the brick immerse it in water completely for a period of 24 hours.
5. After 24 hours of immersion, remove the specimen from water, wipe off the surface water using a damp cloth.
6. Weigh the wet brick and record its weight asW₂. Weighing of the brick must be completely within 3 minutes after removing the brick from water.

Calculation

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

Result

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