Compressive Strength of Brick

Compressive Strength of Brick

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IS Code -1077: 1992

Minimum Strength=3.5 N/mm²

Important Points:-

(i) 3 mm thick plywood is used.

(ii) Select 5 nos. of brick.

Also Read: Fineness Cement of Cement

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Test Procedure:-

(i) Kept 5 nos. of brick in water tub for 24 hours, maintain a temperature between 25⁰c to 29⁰c              (i.e. 27+-2⁰c).

(ii) Take out all bricks after 24 hours.

(iii) Kept all bricks stand up vertically at room temperature for drain out the surplus moisture.

(iv) Now, prepare mortar at ratio 1:3.

(v) Using screen coarse sand of grade 3 mm.

(vi) This mortar is used to fill the frog of brick.

(vii) The same manner will be filled all the five bricks. This is done to bricks make in a uniform section.

Also Read: Methodology for trenchless piping by jack pushing method

(viii) Keep the specimen under damp jute bag for 24 hours. 

(ix) After that we will immerse the specimen in clean water for 3 days.

(x) Mark all the specimen i.e. 1,2,3, 4 and 5.

(xi) Take measure length and width of each specimen. 

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Example:-

Sl. No.	Length (cm)	Width (cm)
1	22.05	11.05
2	23.00	11.00
3	23.00	11.00
4	22.05	11.00
5	22.04	11.01

Also Read: Initial Setting Time of Cement

(xii) Place a 3 mm thickness plywood, on the base of machine and also kept another 3 mm thickness plywood on the top of the brick.

(xiii) Flash mark should be in front of and the mortar face will be upward.

Compressive Strength=Maximum load at failure (in N)/Area of specimen (in mm²)

(xiv) Observation Sheet-

Sl. No.	Actual Size of Brick (in cm*cm)	Compressive Load (T)	Compressive Strength        (N/mm2)
1	22.05*10.05	27.00	12.00
2	23.00*11.00	26.50	10.47
3	23.00*11.00	25.00	9.00
4	22.05*11.00	26.00	10.70
5	22.04*11.01	27.00	11.12

Now, Average Compressive Strength=10.65 N/mm2

Always remember:-

For case 1.:-

Area of brick=220.5*100.5 mm2=22160.25 mm2

Compressive Load= 27 Ton=270 N (Because 1 Ton=10 Newton approx)

Now, 270/22160.25=0.012, for make it constant we multiply 1000.

 

Then,0.012*1000=12 N/mm2

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Written By-

Ritesh Raj

Email Id-rajritesh.motiharirr@gmail.com