USE OF PLASTIC IN ROAD CONSTRUCTION

1. Utilization of waste plastic in road
construction
PRESENTED BY
DESAI PRITHVIRAJ NARAYAN
T.E.-C (CIVIL)
ROLL NO.-45
UNDER THE GUIDANCE OF
Prof. A. S. KULKARNI Prof S. V.
PATASKAR
(SEMINAR GUIDE) (HOD)
D.Y.PATIL COLLEGE OF ENGG. AKURDI,PUNE-44

2. How this idea emerged?
Threats of bans on POLYBAGS in India –Dirty polybags
Waste eyesore-landfills full up.
Realistic Situation-
-Raw materials scarce in INDIA .
-Economies of Asia-similar old disposal habits .
-Cost and price driven responses can survive.
-We firmly believe waste in only a resource in the wrong
places.

3. Outline
 Introduction
 About the plastics
 Steps for using plastics
 On site execution
 Characteristic of waste plastic bitumen
 Characteristic of plastic coated aggregate
 Advantages
 Disadvantages
 Conclusion

4. INTRODUCTION
Recent studies in this
direction have shown some
hope in terms of using plastic-
waste in road construction
i.e., Plastic roads. Plastic
roads mainly use plastic
carry-bags, disposable cups
and PET bottles that are
collected from garbage
dumps as an important
ingredient of the construction
material. When mixed with
hot bitumen, plastics melt to
form an oily coat over the
aggregate and the mixture is
laid on the road surface like a
normal tar road.

5. What is plastic?
 A plastic material is any of a wide range of
synthetic
or semi-synthetic organic amorphous solids
used in the manufacturing of industrial products.
Plastics are typically polymers of high molecular
mass
and may contain other substances to improve
perfo-
-rmance and/or reduce costs. Monomers of plastic
are
either natural or synthetic organic compounds
Discarded thin-plastic carry-bags are a
menace.

6. PLASTIC WASTE,
HARMFULL TO EARTH

7. STEPS FOR USING PLASTICS
IN ROADS:-
1. Segregation.
2. Cleaning process.
3. Shredding process.
4. Collection process.

8. 1) SEGREGATION-
◦ Plastic waste collected from various sources
must be separated from other waste.
◦ Maximum thickness of 60 microns.
2) CLEANING PROCESS-
◦ Plastic waste get cleaned and dried.
SEGREGATION
PROCESS
CLEANING PROCESS

9. 3) SHREDDING PROCESS-
Different types of plastic wastes are mixed together and
Plastics gets shredded or cut into small piece.
4) COLLECTION PROCESS -
Then plastic waste retaining in 2.36 mm is collected.
COLLECTED PLASTICSHREDDING PROCESS

10. On site execution
There are two type of execution
 1. WET PROCESS
 2. DRY PROCESS

11. Wet Process
 Blending of waste plastics by direct
mixing
of shredded plastics with hot bitumen at
160°C
 Mechanical stirrer is needed as the mixing
is difficult because of difference in
viscosities of molten polymer and
bitumen.
 Addition of stabilizers and proper cooling
are required.
 Since the wet process require a lot of
investment and bigger plants
 Not commonly used..

12. Dry Process
 This process is developed by Dr. Vasudevan.
 The aggregate is heated to 170°C in the Mini
hot Mix Plant .
AGGREGATE TRANSFERRED TO
PUDDLING CHAMBER
MINI HOT MIX PLANT

13.  The shredded plastic waste is added in equal
proportion.
WASTE PLASTICS MIXED WITH THE HOT
AGGREGATES

14. COATED AGGREGATE PLAIN AGGREGATE
 This plastics gets coated over the
aggregate uniformly.

15. BITUMEN IS ADDED WITH
COATED AGGREGATE
AGGREAGTE PALSTIC BITUMEN
MIX
• Immediately the hot Bitumen at
160°C is added with the mixture.

16.  The mixture is transferred to the
road and the road is laid.
Road is being laid

17. CHARACTERIZATION OF WASTE
PLASTICS
17
Percentage of
plastics coating
over
aggregate
Compression
Strength
( Tonnes)
Bending
Strength
(Kg)
10 250 325
20 270 335
25 290 350
30 320 390

18. % of
Plastics
Moisture
absorption Soundness Voids
Aggregate
crushing
test
Los angeles
abrasion
Nil 4% 5% 4% 26% 37%
1% 1% NIL 2.2% 21% 32%
2% 1% NIL 1% 20% 29%
3% 0.5% NIL NIL NA NA
5% 0.35% NIL NIL NA NA
10% 0.12 NIL NIL NA NA

19. SR.NO
.
PROPERTIES PLASTIC ROAD ORDINARY ROAD
1. Marshal Stability Value  More (200-300 %) × Less (25 %)
2. Binding Property  Better × Good
3. Softening Point  Less × More
4. Penetration Value  More × Less
5. Tensile Strength  High × Less
6. Rutting  Less × More
7. Stripping (Pot Holes)  No × More
8. Seepage of water  No × Yes
9. Durability of roads  Better × Good
10. Cost of Pavement  Less × Normal
11. Maintenance Cost  Almost Nil × More
12. Environment Friendly  Yes × No
Waste Plastic Bituminous Road V/s
Ordinary Bituminous Road

20. Characteristic of plastics coated
aggregate
 Los Angel’s Abrasion Test –
◦ Wear and tear values of plastic coated aggregate
if found to be decreasing while using plastics.
◦ Eg. 37% without plastic, 32% with 1% plastic,
29% with 2% plastic.
 Soundness Test-
◦ The plastic coated aggregate, did not show any
weight loss, hence improve the quality of the
aggregate.

21. ADVANTAGES
 Simple process, no new machinery is
required
 Use higher percentage of plastic waste.
 Reduce the need of bitumen by around
10%.
 Increase the strength and performance of
the road.
 Reduce the cost to around Rs. 5000/Km.
of single lane road.
 Generate jobs for rag pickers.
 Develop a technology, which is eco-
friendly, no toxic gas evaluation.
 Reduced penetration and ductility, a
higher softening point, resist the
permeation of water and cold cracking.

22. DISADVANTAGAES OF PLASTIC
ROADS
1. Cleaning process
Toxics present in the co-mingled
plastic waste would start leaching.
2. During the road laying process
In the presence of chlorine will
definitely release noxious HCL gas.
3.After the road laying
The components of the road, once it
has been laid, are not inert.

23. Trisool Road (Tamil Nadu)
Laid in April 2010
Photo date Jan 2013

24. Jubilee Park Road (Jamshedpur)
Laid in Jan 2012
Photo date Aug 2016

25. CONCLUSION
 Plastic will increase the melting
point of the bitumen.
 Use of the innovative technology
not only strengthened the road
construction but also increased the
road life.
 Help to improve the environment
(eco- friendly).
 Plastic road would be a boon for
India’s hot and extremely humid
climate where durable and eco-
friendly roads which will relive the
earth from all type of plastic waste.

26. We can’t imagine the world without
plastic…
And from now we should have
to start looking at plastic as
sustainable resource rather than a
waste.
The Govt. has to take initiative
& make the use of waste plastic
mandatory…

27. REFERENCE
 Vasudevan .R, utilization of waste plastics for flexible
pavement, Indian High Ways (Indian Road Congress), Vol.34,
No.7. (July 2006).
 S.S.Verma,(2008),Roads from plastic waste, The Indian
Concrete Journal ,pp.43-47
 IRC, “Tentative Specifications for Bituminous Surface
dressing Using Pre-coated Aggregates,” IRC: 48-1.972, Indian
Roads Congress.
 National Rural Roads Development Agency
 Ministry of Rural Development, Gol.Guidelines for the use
of Plastic Waste in Rural Roads Construction.