PLASTIC WASTE IN ROAD CONSTRUCTION rasla 1.pdf

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2. CONTENTS
•Introduction
•What are waste plastic roads
•Why plastic
•How to uses
•Field trails
•Advantages
•Disadvantages
•Case study
•Waste plastic bituminous road V/s ordinary bituminous road
•Conclusion
•Thank you

3. INTRODUCTION
Disposal of waste plastic is a major problem. It is non-biodegradable and it
mainly consists of low density polyethylene.
Burning of these waste plastic bags causes environmental pollution.
To find its utility in bituminous mixes for road construction, laboratory
performance studies were conducted on bituminous mixes.
Laboratory studies proved that waste plastic enhances the property of the mix.

4. Plastic roads mainly use plastic carry bags, disposable cups and bottles that are
collected from garbage dumps as unimportant ingredient of theconstruction material.
Improvement in properties of bituminous mix provides the solution for disposal in an
useful way.
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 ARE WASTE PLASTICROADS?
The roads constructed using waste plastic, popularly known as plastic roads, are found
to perform better compared to these constructed with conventionalbitumen.

6. WHY PLASTIC?
Resistance to water, wear and tear
Durability.
Available at low cost.
Disposal issues.
Environmental and ecological issues
Properties enhanced.

7. HOW TO USES?
1.SEGREGATION
Plastic waste collected from various sources must be separated from other
waste.
Maximum thickness of60 microns.

8. 2.CLEANING PROCESS
Plastic waste get cleaned and dried.

9. 3.SHREDDING PROCESS
Different types of plastic wastes are mixed together and plastics get shredded or cut
into small pieces.
Bottles Bale Plastic Waste Shredding Machine Dual Shaft Automatic Overload
Protection

10. 4.COLLECTION PROCESS
Then plastic waste retaining in 2.36mm is collected.

11. FIELD TRAILS
WET PROCESS
DRY PROCESS

12. WET PROCESS
Waste plastic by direct mixing with hot bitumen at 160°C.
Mechanical stirrer is needed.
Since the wet process require a lot of investment and bigger plants so not commonly
used.

13. DRY PROCESS
Plastic waste like bags, bottles etcare cut into a size between 2.36 mm and 4.75 mm
using shredding machine.
The aggregate mix is heated to 170°C. and then it is transferred to mixing chamber.
Similarly the bitumen is to be heated up to a maximum of 160°C.
At the mixing chamber, the shredded plastic waste is added over the hot aggregate.
The plastic waste coated aggregate is mixed with hot bitumen.

14. The dry process
Preheated aggregate
( 20 to 10mm size )
Shredded plastic wastes
( 2.36 to 4.75 mm )
Plastic coated
Bituminous
aggregates
Road laying at
120°C
Bitumen
Wet process
Plastic coated bituminous
aggregates
Laying roads at 120°C
Cooling up to 120°C
Preheated aggregate
Bitumen
Polymer
waste
Bitumen with aggregates
heated at 170°C

15. 165°C
Waste plastics
Hot bitumen at 160°C 110°-120°C
DRY PROCESS
Aggregates Hot aggregate
Poly coated
aggregates
Polymer bitumen
aggregates
mixture
Road laying

16. •HOT MIX PLANT

17. •WASTE PLASTIC MIXED WITH HOT AGGREGATE

18. •BITUMEN IS ADDED WITH PLASTIC COATED AGGREGATE

19. •ROAD LAYING

20. ADVANTAGES
Better resistance towards rain water and water stagnation.
No stripping and no potholes.
The strength of the road is increased by 100%.
The cost of road construction isalso decreased.
The maintenance cost of road is almost nil.
Use higher percentage of plastic reduces the disposalproblem of waste plastic.
Reduce the need of bitumen by around 10%.

21. DISADVANTAGES
Cleaning process:
Toxics present in the co-mingledplastic waste wouldstart leaching.
During the road laying process:
In the presence of chlorine will definitelyrelease HCL gas.
After the road laying:
It is opined that the first rain will trigger leaching, as the plastic will merely from a
sticky layer,(mechanicalabrasion).

22. CASE STUDY
•Location:Bengaluru
•Company:BBMP&KKPlasticWasteManagement
•Year:2003-04
•Method: By dryprocess mixedasphaltwith8%ofrecycledplastic waste.
•Used: Used50ton ofplastic wasteand laid250km road.
Jaymahalroad bengaluru

23. WASTE PLASTIC BITUMINOUS ROAD V/S
ORDINARY BITUMINOUS ROAD
SI NOPROPERTIES PLASTIC
ROAD
ORDINARY
ROAD
1 Marshalstability value More 200 –300% Less25%
2 BindingProperty Better Good
3 Softening Point Less More
4 PenetrationValue More Less
5 Tensilestrength High Less
6 Rutting Less More
7 Stripping (Pot Holes) No More
8 Seepageof water No Yes
9 Durability of road Better Good
10 Costof pavement Less Normal
12 Maintenance Cost Almost Nil More
13 EnvironmentFriendly Yes No

24. CONCLUSION
Use of innovative technology not only strengthened the road construction but also
increased the road life.
Help to improve the environment.
Plastic road would be a boon forIndia's hot and extremely humid climate where
durable and eco-friendly roads which will relive the earth from all type of plastic
waste.

25. Thank you