How to Determine the Compressive Strength of Bricks? // Test on Bricks//

Determination
of Compressive Strength of Bricks

The compressive strength of bricks is determined by carrying out the experiment in a laboratory with the help of compression testing machine.

At first, the number of specimens is taken from the stack.

The specimen should not contain any uneven portion in the bed faces.

Then, immerse the specimen in water for 24 hours at room temperature.

After 24 hours, remove the specimens and wipe it.

Then, fill the frog with the cement mortar of ratio 1:3.

These bricks are stored under the damp jute bags for 3 days.

After 3 days, take the specimens and wipe off any trace of moisture.

Place the specimens with the plywood of 3 mm on both sides in the compression testing machine, with the mortar filled portion facing upwards.

Now, apply load axially at a uniform rate of 14 Newton per mm square per minute till failure occurs on bricks.

Note the maximum load at which the brick fails.

Thus,

This test is repeated for a number of specimen and average of results is taken as compressive strength of bricks for the particular batch of bricks.

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