1. The document summarizes a presentation on a six-week internship at NKG Infrastructures Limited working on the construction of an army residential building in Jalandhar Cantt. 2. Key aspects of the project covered reinforcement standards, water tank specifications including capacity and materials, use of a batching plant, and plastering techniques including a grit wash external plaster layer. 3. Common construction defects observed were concrete not being properly filled and honeycombing in concrete surfaces.

1. 1
Presentation on six weeks internship
at
NKG Infrastructures Limited
“Construction of army residential building”
Jalandhar Cantt
Submitted by :-Md Sharique(11306175)
School Of Civil Engg.
Lovely Professional University

2. CONTENTS
 Learning objectives
 About project
 Lap joints
 Water Tank
 Batching plant
 Plastering(Grit wash)
 Defects
 Conclusion
2

3. ABOUT PROJECT
 Grade of concrete used - M25
 Lateral ties - 10 mm and 8mm
 Design life - 80 years
 Type/Class of structure - Class A
 Type of foundation - Raft
 Designed for fire resistance - 1.5 hours
3

4. LEARNING OBJECTIVES
 All reinforcement bars should be Thermo Mechanically treated steel
bars of Fe-500 grade
 Clear Cover to Reinforcement
1. For Footing bottom face -75mm
2. Footing side and top face - 50mm
3. Column - 40mm
4. Beam - 25mm
5. Slab - 20mm
 For faces of members likely to be in direct contact with ground clear
cover should be greater of either
Dia of Main reinforcement bar
or
Equal to 50mm
4

5. Grade of conc. Tension bars Compression
bars
Remarks
M-25 40.5 x D 32.5 x D D is dia. Of
reinforcement
bars
5

6. WATER TANK
 Capacity - 30,000 ltrs
 Material - Rcc and concrete
 Reinforcement used - 8 mm for tie bars and 10mm as
distribution bars bothway and 12 mm as main bars in
beams.
 Size of Beam - 230× 450 mm
 Grade of concrete –M25
 Tank is divided in 3 equal portions i.e 10,000 ltrs in each
portion and baffel walls are made.
 Two portions are used for drinking and other purposes
while 1 portion is used as reserved for fire and other
mishaps. 6

7. 7

8. 8

9. 9
Fig showing 10 mm dia
steel Fe500 D

10. Machine Room
Water Tank
10
Binding wire
Hook used to tie
reinforcement with help of
binding wire

11. Reinforcement
12

12. Concreting
13

13. 14
Concreting done with concrete pump

14. 15
Beams & slab after concreting Slab after casting 15 cm thick
Further reinforcement Further formwork

15. BATCHING PLANT
16

16. 17

17. Conveyor belt
Operating Unit
Cement Storage
Mixing Unit
18

18. PLASTERING - GRIT WASH
(EXTERNAL PLASTER)
 Plaster to be applied in two layers i.e after raking
first layer of 15 mm thick cement mortar (1:4) and
again make surface rough.
Curing to be done for atleast 7 days 19

19. SECOND LAYER
20
Making square boxes as per design
using thin tapered wooden batten fixed
over previous layer with nails. Battens
must be removed with great care so that
edges are not damaged.
Wash marble chipping with clean water
before application.
Wet the previous layer with water and
then apply mix.
Mix should be made with marble chipping 12mm mixed in grey 65% approx. and
white cement 35% approx.
1:0.5:2 where 1 proportion is of mixed grey and white cement, 0.5 is marble
powder and 2 represent marble chipping of 12mm size.

20. 21
1:1/2:2
1=.65 grey
cement+.35
white cement
½=marble
powder
2=marble
chipping
Marble chipping 12mm

21. Mix made is applied in uniform thickness and is pressed properly
with wooden float for proper bonding with previous layer and is
finished upto true surface.
After initial setting it is watered to achieve strength.
H2SO4 mixed with water is used for washing and scrubbing
purposes. Suitable brushes are used and top layer is scrubbed
until natural colour of marble chipping is achieved.
22

22. DEFECTS
23Concrete not filled
properly

23. 24
Honeycombing

24. CONCLUSION
 Six weeks internship was very helpful to me. I get
practical knowledge that how task is executed.
 I learnt about working of concrete pump, batching
plant, water tank, grit wash and some defects.
25

25. 26