This document discusses using plastic waste in road construction. Plastic waste like bags and bottles are shredded then mixed with heated bitumen and aggregates. This mixture is used to construct roads similarly to normal tar roads. Using plastic waste increases the strength and performance of the road while reducing costs. It also helps reduce plastic waste in landfills and generates jobs for waste pickers. However, there are concerns about toxins leaching from the plastic during construction and use of the road over time. More research is still needed but plastic roads show promise as a more sustainable construction material.

1. Presented By-:
Sulakshya Gaur
(121684)
Use Of “PLASTIC WASTE”
In Road Construction

2. CONTENT
 INTRODUCTION
 PLASTIC ROAD
 MATERIAL USED
 METHOD OF MIXING
 ADVANTAGES
 DISADVANTAGES

3. INTRODUCTION
Plastic use in road construction is
not new. 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.

4. What is plastic??
A material that contains one or more organic polymers of
large molecular weight, solid in its finished state and at some
state while manufacturing or processing into finished articles,
can be shaped by its flow.
Types of Plastics
1.Thermosets.
2.Elastomers.
3.Thermoplastics.
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5. Materials Used
 Aggregates
 Bitumen
 Waste plastic

6. Specifications for Waste Plastic
The following types of waste plastic can be used in the construction
of rural roads:
• Films (Carry bags, Cups) thickness up to 60micron (PE,PP and PS)
• Hard foams (PS) any thickness
• Soft foams (PE and PP) any thickness
• Laminated plastics thickness up to 60micron (Aluminum coated also)
packing materials used for biscuits, chocolates, etc.

7. BASIC PROCESSES
 Segregation
 Cleaning process
 Shredding process
 Collection process
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8. Segregation
 Plastic waste collected from various sources must be
separated from other waste.
 Maximum thickness of 60 microns.
SEGREGATION PROCESS
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9. Cleaning Process
 Plastic waste get cleaned and dried.
Cleaning Process
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10. Shredding Process
 Shredded or Cut into small piece.
 Then different types of plastic wastes are mixed
together
Shredding process
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11. Collection process
 The plastic waste retaining in 2.36 mm is collected.
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12. METHOD OF MIXING:
1. DRY PROCESS
2. WET PROCESS

13. DRY PROCESS
 Plastics waste like bags, bottles etc are cut into a size between
2.36 mm and 4.75mm using shredding machine.
 The aggregate mix is heated to 1700C. and then it is transferred
to mixing chamber.
 Similarly the bitumen is to be heated up to a maximum of
1600C.
 At the mixing chamber, the shredded plastics waste is added
over the hot aggregate.
 The plastics waste coated aggregate is mixed with hot bitumen.

14. WET PROCESS
 Waste plastics 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.

15. CHARACTERISTICS OF PLASTIC
COATED AGGREGATE
1 .Aggregate impact value
 Plastics improves aggregate impact value.
 Helps to improve the quality of flexible pavement
Aggregate impact value
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16. 2.Los Angel’s Abrasion Test
 Wear and tear values of plastic coated aggregate is found to
be decreasing the percentage of plastics
 (Eg.37% without plastic, 32% with 1% plastic and 29% with
2% plastic)
3.Soundness Test
 The plastic coated aggregate, did not show any weight loss,
improvement in the quality of the aggregate.
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17. % 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

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

19. ADVANTAGES OF PLASTIC ROAD
 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.
 Improvement in fatigue life of roads.
 Better resistance towards rain water and cold weather Better
resistance towards rain water and cold weather
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20. DISADVANTAGES OF PLASTIC
ROADS
1. Cleaning process
 Toxics present in the co-mingled plastic waste would d start
leaching.
2. During the road laying process
 The presence of chlorine will definitely release noxious HCL
gas.
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21. 3. After the road laying
 The components of the road, once it has been laid, are not inert.
 It is opined that the first rain will trigger leaching. As the
plastics will merely form a sticky layer, (mechanical abrasion).
 once the road is started to be used will cause the release of fine
polymer particles.
 When air-borne, these will cause a particulate problem.
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22. CONCLUSION
 Use of the 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 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.
 Roads laid with plastic waste mix are found to be better
than the conventional ones.
 Plastic will increase the melting point of the bitumen.
 Rainwater will not seep through because of the plastic in
the tar. So, this technology will result in lesser road repairs.
 Use of the innovative technology not only strengthened the
road construction but also increased the road life.
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23. 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.