this ppt is seminar on hindustan college of science & technology farah mathura in 2013. in ppt shows the work procedure of construction of road.

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2. Public works department Uttar Pradesh
C. D.-3
Mainpuri
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Preparation of base
Form working
Preparation of subgrade
Watering of base
Joints
Material mix & placing
Compaction
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6. 8. Finishing of surface
8A. Floating
8B. Belting
8C. Brooming
9. Curing
10. Joint filling
11. Edging
12. Open to traffic
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7. 1. Rolling on sub grade by roller
2. Filling the granular soil in the weak part and
pot holes
3. Correct the soil coat , Camber , longitudinal
slop
When concrete direct laid on subgrade, For
preventing the water-seepaging into the soil ,
used water proof paper on entire length.
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9. Choose any one type of base
1. W.B.M. base
As base material of W.B.M. Road; stone ballast,
concrete 10-15cm layer are used. For bonding
between concrete slab & W.B.M. used 1:2 cement
wash on W.B.M.
2. Concrete base
On the road used 10cm Cement concrete(1:2:4) or
lime concrete(16:32:64)
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10. 3. Granular medium material layer
10-15cm composite layer of sand , moorum ,
bajri are used for better drainage facilities
4. Stabilization soil
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11. Material for form workWooden sheets, battens, plywood, fibre hard
board, steel plates, angles, rope, minerals.
1. before using form work, it should free from all
type material like as dust ,cement.
2. To placing the concrete in appropriate depth
used 2.5-5cm thick and 3mtr long wooden sheeting.
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12. 3. The depth of wooden block must be same
as level of slab thick.
4. After 24hrs form work displaced next length
of road.
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13. If base is dry
Than using the sprinkling process on it properly
after that placing the concrete.
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14. Where is necessary to provide transverse,
Longitudinal joints; there wedge of woods,
metals fix on level of concrete.
After setting of concrete it should be pull
out.
If provided the dowel bar in joints, bars
should be fit at right position.
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15. Mixer is equipment that mix the concrete using distinct
amount of cement , concrete, sand and water. Concrete
slab should have more than 5-10cm thick cause of drying.
Used two type mixer1. Batch mixerat site, used for small road construction
2. Continuous mixerContinuous mixer used for large construction .
if distance is more from site , mix concrete
transported at site within setting time.
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17. Two methods generally used in placing of
concrete1. Alternate bay methodPlaced the concrete on both side of road
alternatively like as1,3,5… part at one side and
2,4,6… part other side .
1st side
2nd side
This method have slow process due to road
traffic problems.
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18. 2. Continuous bay methodconstruct one side of road regularly, if
completed some part of first side than
construct other side.
this method have fast process without no
obstruction of traffic
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19. Purpose of compaction is that to pull out air
from void and make concrete harden.
Compaction done by1.mechanically surface vibrator
2. manually hand tempers
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20. 1.FloatingFor levelling the surface use floating, screeding , power trowel. So that there is no
acceptable more than 3mm variation in concrete
level surface.
2.BeltingFor making surface clean used belting
process. Belt is nothing but a 15-30cm thick
sheets of canvass which have more length than
road.
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22. 3. BroomingBrooming is the process in which we made
rough surface parallel to road by brush.
It useful in avoiding slip & comfortable
travelling on road .
the depth of line on road no more than
1.5mm.
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23. Curing is the name of increasing the
hydration process of cement.
after setting the concrete , curing process
done till 14-28days.
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24. Some method of curing are1.Shading concrete works
2. Covering with hessian & gunny bags
3. Sprinkling of water
4.By ponding
5. Membrane curing
6. Steam curing
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26. After drying road, clean the joints and fill the
shelling compound or hot bitumen .
also bitumen fill road bank.
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27. To protect damaging the sides of concrete
pavements used over burnt brick work.
in place of brick, provided kerb of pre mix
concrete.
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28. Generally after a month, road should be
open to traffic.
If used rapid hardening cement it take 7 days
to open traffic.
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