Important Points SOP (Standard Operating Procedure) During the Inspection of RCC NP4 Pipes

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Image
Important Points SOP (Standard Operating Procedure) During the Inspection of RCC NP4 Pipes: -    Image-Hydro Test (Photo Credit: Ritesh Raj) (1.) Firstly, approved QAP will be checked.  (2.) ID marks should be marked on the inner and outer sides of pipes.  Image-ID Mark (Photo Credit: Ritesh Raj)  (3.) To check the inner and outer diameter of pipes.   (4.) Smooth finishing and before dispatch of RCC pipes cement slurry or grouting where required.   (5.) Load test is required for RCC pipes as per IS codes. It is different for each dia, of RCC pipes.  Image-Plate Load Test (Photo Credit: Ritesh Raj)   (6.) Concrete mix design checked and in which cement content, cement brand, and water-cement ratio should be checked.  (7.) The straightness test to be checked of RCC pipes through the straightness rods to collinear visible.   (8.) As per requirement 2% of hydro tests are to be checked as IS:458 of the total ordered quantity.  Image-Hydro Test (Pressure Release) (Photo Credit: Ritesh Raj)  
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Compressive Strength of Brick

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Compressive Strength of Brick

Brick Masonary (Image Source: (Pexels.com)


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

Brick Masonary (Image Source: (Pexels.com)

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. 

Brick Masonary (Image Source: (Pexels.com)

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


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