Plastic roads

1. PLASTIC ROADS

2. CONTENTS
• Introduction.
• What are plastic roads?
• Field trials
• Comparison between ordinary road and plastic road
• Advantages of plastic roads
• Disadvantages of plastic roads
• Conclusion

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 an
important ingredient of the construction 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 PLASTIC ROADS?
• The roads constructed
using waste plastic,
popularly known as
plastic roads, are found to
perform better compared
to these constructed with
conventional bitumen.

6. Plastic
Why how Which

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

8. TYPE OF PLASTIC ORIGIN
Low density polyethylene
(LDPE)
Bags, sacks, bin lining
High density polyethylene
(HDPE)
Bottles of pharmaceuticals, disinfectants, milk, fruit
juices, bottle caps
Polypropylene (PP) Film wrapping for biscuits, microwave trays for ready
made meals
Polystyrene (PS) Yoghurt pots clear egg packs, bottle caps
Polyvinyl chloride (PVC) Mineral water bottles, credit cards, toys, pipes and
gutters, electrical fittings, furniture, folders and pens

9. HOW TO USE
1.SEGREGATION:
• Plastic waste collected
from various sources
must be separated from
other waste.
• Maximum thickness of
60 microns.

10. 2.CLEANING PROCESS
• Plastic waste get cleaned and dried.

11. 3.SHREDDING PROCESS:
• Different types of plastic wastes are mixed together and
plastics gets shredded or cut into small piece.

12. 4. COLLECTION PROCESS:
• Then plastic waste retaining in 2.36 mm is collected.

13. FIELD TRIALS
• Dry process
• Wet process

14. DRY PROCESS

15. HOT MIX PLANT

16. WASTE PLASTIC MIXED WITH THE HOT
AGGREGATE

17. BITUMEN IS ADDED WITH PLASTIC
COATED AGGREGATE

18. ROAD LAYING

19. WET PROCESS
• Waste plastics by directly mixing with hot bitumen at 160 ͦC.
• Mechanical stirrer is needed.
• Addition of stabilizers and proper cooling.
• Since the wet process require a lot of investment and bigger
plants.
• Not commonly used.

20. COMPARISION BETWEEN ORDINARY BITUMEN ROAD AND
WASTE PLASTIC ROADS:
SL.
NO
PROPERTIES ORDINARY ROADS PLASTIC ROADS
1 MARSHALL STABILITY VALUE LESS MORE
2 BINDING PROPERTY GOOD BETTER
3 SOFTENING POINT MORE LESS
4 PENETRATION VALUE LESS MORE
5 RUTTING MORE LESS
6 STRIPPING (POT HOLES) MORE NO
7 DURABILITY OF THE ROADS GOOD BETTER
8 SEEPAGE OF WATER YES NO

21. 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 is also decreased.
• The maintenance cost of road is almost nil.
• Use higher percentage of plastic reduces the disposal problem of
waste plastic.
• Reduce the need of bitumen by around 10%.

22. DISADVANTAGES
• Cleaning process: Toxics present in the co-mingled plastic
waste would start leaching.
• During the road laying process: In the presence of chlorine
will definitely release 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,
(mechanical abrasion).

23. 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 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.

24. REFERENCE
• Bhogayata, “ Feasibility of waste metalized polythylene used as
constituent” April 2010.
• Bindhu C.S and Dr. K.S.Beena., “Waste plastic as additive in stone
mastic asphalt” September 2012.
• Konin a, “Effect of plastic waste content on mechanical property
of flexible pavements” December 2012.
• Mercy Joseph Poweth, Solly George, Jessy Paul, “Study on use of
plastic waste in road construction” March 2013.