How to Perform Water Absorption Test of Bricks as per Specification #(ASTM, C67-94)

How to Perform #absorptionofwater #bricks
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The water absorption of a brick is the amount of water it absorbs relative to its weight. A good quality brick should absorb no more than 20% of its weight in water after being immersed in cold water for 24 hours. The percentage of water absorbed is calculated by using the formula: (Final weight - Initial weight) / Initial weight * 100.
The water absorption of different types of bricks varies:
Heavy duty bricks: 5% water absorption
First class bricks: 20% water absorption
Second class bricks: 22% water absorption
Third class bricks: 25% water absorption
To test the water absorption of a brick, you can:
Weigh the brick when it's dry
Immerse the brick in fresh water for 24 hours
Remove the brick from the water and wipe it off with a cloth
Weigh the brick again while it's wet
Calculate the percentage of water absorbed using the formula above
Test Procedure:
For the water absorption test, the specimens are dried in an oven for a specified time and temperature and then placed in a desiccator to cool. Immediately upon cooling the specimens are weighed. The material is then emerged in water at agreed upon conditions, often 23°C for 24 hours or until equilibrium. Specimens are removed, patted dry with a lint free cloth, and weighed.