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...
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Determination of Dry density of soils in place by the core-cutter method

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Determination of Dry density of soils in place by the core-cutter method

Image Source:Cementconcrete.org

IS code for this test-2720 (Part-29)

Note:-

Sl. No.

IS Code

Part No.

Description

1

2720

28

Determination of dry density of soils in place by the sand replacement method

2

2720

33

Determination of the density in place by the ring and water replacement method

3

2720

34

Determination of density of soil in place by the rubber-ballon method

Recent Post:-Important terms/points of civil engineering

Image Source:dirindiamart.com

Apparatus required for this test:-

      (1.)  Cylindrical Core-Cutter:-

Height=130 mm

Internal Diameter=100 mm

External Diameter=103 mm

Wall Thickness=3 mm

The cutter shall be kept properly greased or oiled.

Image Source:Indiamart.com

Also Read:Important one liner questions with their answers, Part-11

(2.) Steel Dolly:-

Height=25 mm

Internal Diameter=100 mm

Wall thickness=7.5 mm

Note:-Tolerances on all essential dimensions shall be +-0.25 mm.

Image Source:upagriculture.in

(3.) Steel Rammer:-

(i) Solid mild steel foot with 140 mm diameter.

(ii) 75 mm height with a concentrically screwed 25 mm diameter solid mild steel staff.

(iii) The overall length of the rammer including the foot as well as the staff should be approximately 900 mm.

(iv) The rammer (foot and staff together)should weight approximately 9 Kg.

(4.) Weight balance which is accurate to 1 Kg.

(5.) Palette Knife, whose length=20 cm and width=3 cm

(6.) Steel Rule/Steel Scale

(7.) Pick Axe/Spade/Grafting Tool

(8.) Straight Edge:-A steel strip about 30 cm long, 2.5 cm wide and 3 to 5 mm thick, which one bevelled edge will be suitable.

Also Read:Important one liner questions with their answers, Part-10

Test Procedure:-

(1.) Before starting this test, MDD (Maximum Dry Density) and OMC (Optimum Moisture Content) is required.

(2.) Select the location where test will be done.

(3.) In a single layer, mark 3 locations and it will be in zig-zag location not in a straight line.

(4.) One-by-one core is inserted in ground through the rammer.

(5.) The thickness of each compacted layer will be 150 mm to 200 mm or as mentioned in the Contract document/Technical specification/FQP.

(6.) We have removed out the core from the ground and separate their collar from the core.

 (7.) Must determine during the core was outed from the ground, the core’s soil should not disturb.

(8.) Now, core is cleaned surrounding areas and both ends of core is make plane and equal level through knife.

(9.) Filled the format with required data, which is obtained through test. (Format is also mentioned in the IS:2720,Part-29)

(10.) Now, get the result. The result of compaction will minimum 95% of average of three cores in each layer.



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Written By-
Ritesh Raj
Email Id-rajritesh.motiharirr@gmail.com



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