AIM:
Compressive Strength test on bricks is conducted to determine the Crushing strength of bricks.
APPARATUS:
1. CTM ( Compression Testing Machine )
2. Water bath
3. 3mm Ply wood sheets
4. Cement & Sand
5. Mixing tool & Enamel tray
6. Jute bag
7. Brick Specimens ( 5 Numbers )
PROCEDURE:
1. At first, place all the 5 brick specimens in water bath for 24 hours at a temperature of 25 to 29 degrees.
2. After 24 hours, take out the bricks from water bath and allow them to dry any surface moisture.
3. Now, prepare the cement mortar of ratio 1:3 ( 1-cement & 3-sand ) in enamel tray with the help of mixing tools.
4. Now, fill the frog of all 5 bricks with the prepared cement mortar to level the top surface of all bricks.
5. Then, keep the brick specimens covered under damp jute bag for 24 hours.
6. After 24 hours, remove the jute bag over bricks and place them again in water bath for 3 days.
7. After 3 days, take out the bricks and wipe the surface moisture of bricks with a cloth.
8. Now, measure the exact length and width of the 5 brick specimens and note them in a table.
9. Then take one brick specimen and place it in between the plywood sheets placed on CTM with the mortar filled surface of brick facing top.
10. Now, apply the load uniformly on the brick specimen and note the load at failure of brick.
11. Remove the crushed brick from CTM and repeat the test for remaining 4 brick specimens and note down their failure loads.
12. Then finally Compressive Strength of bricks can be calculated in N/mm2 by using the below formula:
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