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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Specific Gravity of soil By Pycnometer Method

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  Specific Gravity of soil By Pycnometer Method     

Image Credit:indiamart.com


Test Procedure- 

(1.) Make sure that the reading on the balance is initially zero after kept a paper.

(2.) Weight 200 gm of soil sample.

(3.) Now, weight pycnometer (with top) and take the 1st reading (W1). W1=571 gm

(4.) Then fill the pycnometer with soil, weight it and take the 2nd reading (W2). W2=774 gm

(5.) Now, add water to the soil, till completely  fill the jar.

(6.) Then weight the pycnometer (Water +Soil) and take the 3rd reading (W3). Kept the top on jar. W3=1628 gm

(7.) Then waste the mixture and refill the pycnometer with water only.

(8.) Weight the water with pycnometer and their top and take the 4th reading (W4). W4=1530 gm

(9.) Put all these values in this formula.

            W2-W1/(W4-W1)-(W3-W2)

Where,

W1=Empty weight of pycnometer

W2=Weight of pycnometer +Soil

W3= Weight of pycnometer +Soil +Water

W4=Weight of pycnometer +Water

(10.) Now, Put the all values, 

           =774-571/(1530-571)-(1628-774)

           =203/959-854

           =1.933 

Note:-

(A.) If the answer is 


2.68-2.72                  It is silt.

2.47-2.58                  It is clay.

2.34                          It is bentonite.

126-1.80                   It is peat.


(B.) The specific gravity of soil (Silt, Lime, Clay, Bentonite and Peat) will always be in between 0 to 3.



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Written By-
Ritesh Raj

Email Id-rajritesh.motiharirr@gmail.com


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