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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Proctor Test for Compaction of Soil

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 Proctor Test for Compaction of Soil

Image Source: theconstrutor.org


Compaction is a artificial process in which expulsion of air is done by means of mechanical means. The dry density is maximum at certain moisture content, that moisture content which is called optimum water content. A curve is drawn between the water content and the dry density to obtain the maximum dry density and optimum water content.

Dry density of soil=Wet density/(1+W)

Where, W=Water content

Recent Post: Bulking of fine aggregate

Image Source:Civilengineeringforum.me


Apparatus Required:-

(i) Take balance, weight=10 kg, where least count=1 gm

(ii) Rammer, weight= 4.9 kg, where Fall=450 mm

(iii) Proctor mould, Dia.=150 mm, Depth=127.3 mm

(iv) 37.5 gm GI sieve is used. (Note-If soil is coarse, then 37.5 mm sieve is used and for other soil 19 mm sieve is used)

(v) Total soil sample taken=30 kg

(vi) We have taken 6 kg samples of soil in 5 nos. of tray.

Also Read: Specific Gravity of Soil by Pycnometer Method 

Format:-

Moisture density relationship (IS 2720, Part 7 and 8)

Description of material: Soil

Image Source: Geoengineering.org


Observation Sheet 

Type of compaction: Static/Dynamic

Type of method: Standard/Modified

Weight of Rammer: 4.9 kg

No. of blows=55 nos.

No. of layer=5 nos. 

Weight of original sample=6 kg

Sl. No.

Observation

Unit

1

2

3

4

5

6

1

Wt. of Mould (v)

cc

2250

2250

2250

2250

2250

2250

2

Wt. of Mould (a)

gm

6175

6175

6175

6175

6175

6175

3

Wt. of mould + wet soil (b)

gm

10790

11060

11160

11045

10800

 

4

Wt. od wet soil (b-a)=c

gm

4615

4885

4985

4870

4625

 

5

Wt. Density=c/v

gm/cc

2.051

2.171

2.216

2.164

2.056

 

Also Read: Field dry density by sand replacement method

Moisture Content Determination-

Sl. No.

Container No.

_

B-1

B-2

B-3

B-4

B-5

B-6

1

Wt. of container (1)

gm

46.47

44.53

45.09

45.26

42.03

 

2

Wt. of wet soil+container (2)

gm

153

153.6

171.33

164.08

209.11

 

3

wt. of dry soil+container (3)

gm

148.86

147.29

161.99

153.12

191.17

 

4

wt. of water (2-3)=4

gm

4.14

6.31

9.34

10.96

17.94

 

5

wt. of dry soil (3-1)=5

gm

102.39

102.76

116.9

107.86

149.14

 

6

water content (4/5*100)

%

4.04

6.14

7.99

10.16

12.03

 

7

Dry density

gm

4.04

6014

7.99

1.964

1.835

 

Test Procedure:-

(i) Mould weight taken=6175 gm

(ii) 4 % moisture to be added i. e. 6000*4/100=240 gm

(iii) 240 gm water is added and mix properly. In that time, wear gloves.

(iv) After mixing the water with soil, we will separate soil into 5 parts in the pan.

(v) Fill the soil in mould in 5 layers and each layer 55 blows used.

Also Read: Compressive strength of brick

(vi) Firstly one part from pan is used to fill the mould and 55 blows will used. Similarly, second, third, fouth and fifth part will filled and also 55 blows is used in each layer.

(Note-Here, soil is granular. So, big mould is used and if soil is sandy, then 100 mm mould will used.)

(vii) Now, unscrew the mould and after unscrew we will make plane the mould surface through strater (30 cm) scale.

(viii) Now, weight them. Weight=10.790 kg

(ix) Now, moisture will found with the help of small size container.

(x) weight of empty container is taken.

(xi) Small part of soil is taken from mould with the help of knife/blade.

(xii) Fill the container. Now, weight =153 gm

(xiii) Now 6% water is added for second sample. i.e. 6000*6/100=360 gm

(xiv) Procedure will similar. Repeat continuously.

Also Read: Fineness test of cement

(xv) It will also unscrew and make plane with the help of strater (scale). Now, wt.=11.060 kg

(xvi) Small container B-2 will take and small amount of soil is kept. Now, wt=153.60 gm

Note:- Same procedure will repeat for third, fourth and fifth sample.

(xvii) Now, fill the format.

(xviii) All containers (small size)will  kept on a tray and also kept in oven. Temperature =105-110o c

(For 24 hours)

(xix) Now all containers are remove from oven and then weight and fill into format.

Image Source:geoengineer.org


(xx) For graph platting we will take a graph.


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Written By-
Ritesh Raj

Email Id-rajritesh.motiharirr@gmail.com


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