The document discusses the use of waste plastics in road pavement construction to address issues related to plastic waste disposal and road quality. It outlines the methods of mixing plastic waste with bitumen, advantages such as increased durability and reduced maintenance costs, and possible disadvantages including toxic emissions during the laying process. Successful implementations in Bangalore highlight the potential of this innovative technology to improve road conditions while benefiting the environment.

1. Prof Ram Meghe College of Engg. & Management, Badnera
USE OF WASTE PLASTICS IN
ROAD PAVEMENT
By Vezhoyi Ringa

2. CONTENT
INTRODUCTION
NEED OF STUDY
PLASTIC ROAD
MATERIAL USED
METHOD OF MIXING
ADVANTAGES
DISADVANTAGES

3.  plastic waste is increasing due to
increase in population, urbanization and
development
 Plastics can be divided in to two major
categories: thermoset and
thermoplastics.
 The disposal of waste plastic has
become a serious problem globally due
to their non-biodegradability.

4. Plastic roads mainly use plastic carry
bags, disposable cups and bottles that are
collected from garbage dumps.
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. NEED OF STUDY
Intensity of the traffic is increasing
Need of better quality of road pavement
Disposal of waste plastic is a major
problem.
Waste plastic bags causes environmental
pollution

6. IMPACT OF PLASTIC WASTES ON
OUR ENVIROMENT

9. POOR QUALITY OF ROAD

10. But we can minimize these problems
by using plastic waste in road
construction…

11. PLASTIC ROAD
Plastic road mainly use plastic carry-bags,
disposable cups and plastic bottles that are
melted to form an oily coat over the
aggregate and the mixture is laid on the road
surface like a normal tar road.

12. MATERIAL USED
1) AGGREGATES:
The aggregate used for road work should
be hard, tough, durable and hydrophobic
for bituminous surface.

13. 2) BITUMEN:
Bitumen is used as binders in pavements
constructions.

14. 3) WASTE PLASTICS
Plastic bags, plastic bottles, protective packing
etc.

15. METHOD OF MIXING:
1. DRY PROCESS
2. WET PROCESS

16. 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.

17. 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.

18. ADVANTAGES:
1) The load withstanding property increases.
2) Better resistance towards rain water and cold weather.
3) No stripping and no potholes.
4) Increase binding and better bonding of the mix.
5) No leaching of plastics.

19. 6) For 1km road, 1 ton of plastic (10 lakh carry bags) is
used and 1 ton of bitumen is saved.
7) The maintenance cost of road is almost nil.
8) Disposal of waste plastic will no longer be a problem.

20. DISADVANTAGES
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.

21. DEVELOPMENTS
 The office of the chief minister, New Delhi has a given a
green signal to a private company for supply of bitumen
mixed with plastic which is used for construction of roads.
 The company has already constructed a two-km road in
Bangalore with bitumen mixed with plastic.
 The government of Karnataka was pleased by the success of
the experiment and the state chief minister himself
inaugurated the field test of construction 500 m of road in
three places in and around Bangalore with the help of PWD
using the innovative technology.

22. CONCLUSION
 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.
 Help to improve the environment.
 Plastic road would be a boon for India’s hot and extremely
humid climate where durable and eco-friendly road is
required.