1) Waste plastic from sources like bottles and packaging can be used to coat aggregates that are then used in road construction. The coated aggregates improve the strength and performance of roads compared to those made only with natural materials. 2) Plastic waste is separated, cleaned, shredded, and used to coat hot aggregates at a mixing plant. The coated aggregates are then mixed with hot bitumen to form the final road construction material. 3) Roads made with plastic-coated aggregates require less bitumen, have higher strength and durability, provide a smoother ride, and help reduce environmental problems caused by plastic waste.

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2. USE OF WASTE PLASTIC IN ROAD CONSTRUCTION
PRESENTED BY :
SYED SHAHZAIB ALI
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Abstract:
 Bottles, containers and packing strips etc. is increasing day by day. As a
result amount of waste plastic also increases. This leads to various
environmental problems
it is necessary to utilize the wastes effectively with technical development in
each field. Our present work is helping to take care of these aspects.
 plastic can be used as a coating over aggregate and this coated
stone can be used for road construction.
 The mix polymer coated aggregate modified bitumen have shown
higher strength.

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 Use of this mix for road construction helps to use plastics waste.
 Once the plastic waste is separated from municipal solid waste, the
organic matter can be converted into manure and used.
 Our presentation will discuss in detail the process and its successful
applications.

5. INTRODUCTION
Plastics can be divided in to two major categories: thermosetting and
thermoplastics
 A thermosetting plastic solidifies or “sets” irreversibly when heated. They
are used primarily in automobiles and construction applications.
A thermoplastic softens when exposed to heat and returns to original
condition at room temperature. Thermoplastics can easily be shaped and
molded into products such as milk jugs, floor coverings, credit cards, and carpet
fibers.
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6. Continue ………….
According to recent studies, plastics can stay unchanged for as long as
4500 years on earth.
Increase in the global population and the rising demand for food and other
essentials, there has been a rise in the amount of solid waste being generated
daily by each household.
 Now a days disposal of different types waste produce different place is
more problem.
These material pose different pollution in the environment
 Due to its biodegradability it creates stagnation of water and associated
hygiene problems.
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7. Continue……….
 traditionally Soil, stone aggregate , sand , bitumen cement etc, are used for
road construction .
Natural material being exhaustible in nature, its quantity declining gradually.
Also cost of extracting good quality of natural material is increasing.
In order to contain this problem experiments have been carried out whether this
waste plastic can be reused productively.
The experimentation indicated that the waste plastic, when added to hot
aggregate will form a fine coat of plastic over the aggregate.
Such aggregate, when mixed with the binder is found to give higher strength,
higher resistance to water and better performance over a period of time.
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 Waste plastic such as carry bags, disposable cups and laminated pouches like chips, pan
masala, aluminum foil and packaging material used for biscuits, chocolates, milk and
grocery items can be used for surfacing road.
Global Scenario:
 Every year we dump a massive 2,123,760,175 tons of waste. Engineers predict this
amount increase in 2050 is about 3 billion ton
 Globally this amount have 10% plastic waste.
Data source: The worldcount (www.theworldcount.com)
Pakistan Scenario:
 About 20.24 million tons per year waste annually generated in pakistan.
 59000 tons per day solid waste generated in Pakistan.
 It varies from 0.31 kg/capita/day to 0.61 kg/capita/day rural and urban areas.
Approximately 6 to 8 % plastic in this amount of waste.
Data source: (Ministry of science and technology)

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Faisalabad Scenario:
The current population of Faisalabad is 3.5 million and approximately 1650 tons of
MSW is generated in the city every day (assuming waste generation rate of 0.45
kg/capita/day) .
 waste composition of plastic and rubber is 6.60 %/weight in Faisalabad.
 Collection rate is 60-65%
Data source(Faisalabad waste management company )

10.  The rapid rate of urbanization and development has led to
increasing plastic waste generation.
 As plastic is non biodegradable in nature, it remains in
environment for several years.
 Plastic wastes disposing use at landfill are unsafe since toxic
chemicals leach out into the soil, and under-ground water.
 As stated above, plastic disposal is one of the major
problems for developing countries like Pakistan , at a same
time Pakistan needs a large network of roads for its smooth
economic and social development.
Why I choose this topic for research ?
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Literature review:
The addition of 10 % by weight of processed plastic for the preparation of modified
bitumen results in a saving of 0.5 % bitumen by weight of the mix or about 9.6 kg
bitumen per cubic meter (m 3) of BC mix.The polymer bitumen blend is a better binder
compared to plain bitumen The polymer coated aggregate bitumen mix forms better
material for flexible pavement construction as the mix shows higher Marshall Stability
value and suitable Marshall Coefficient.
Swami1, etal …. (2012) International Journal of Engineering Science and Technology (IJEST)
The concept of using plastic in flexible pavement has been done sine several
years ago in India. The addition of plastic in bitumen improves the stability,
strength, life of bitumen. The polymer bitumen blend is a better binder
compared to plain bitumen. The use of waste plastic in road construction as an
effective way to reutilize the plastic waste
( Neha etal.. (2015) International Research Journal of Engineering and Technology (IRJET).

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Continue ……
The bitumen mixed with plastic improve the quality of road. The use of plastic waste
in mix will help reduction in need of bitumen by amount of 10% increase the strength
and performance of road , avoid disposal of plastic waste by incineration and land
filling and landfilling and ultimately develop technology which is ecofriendly.
N. Rokdey etal …… (2015) (International Conference on Quality Up-gradation in Engineering,
Science and Technology (ICQUEST2015)

13. OBJECTIVES
 To efficiently utilize the waste plastic in constructive way so that it can be
beneficial to society.
 To coat the aggregates with the low density waste plastic materials and use in
non load bearing asphalt pavement roads.
 utilize the waste plastic as a useful binding material , save the bitumen
concert.
 To check the property of mix bitumen specimen.
 To compare the properties of bitumen mix specimen with pure bitumen
specimen
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Material and methodology:
 Aggregate.
fine aggregate ( stone dust)
course aggregate (2/8”) and zero size.
 Bitumen(Tar)
quality use 80/100 grade bitumen.
 Waste plastic
Mix plastic in shredded form.

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Basic process .
1 segregation
Plastic waste collected from various source must be segregated from other waste.
Maximum thickness 60 microns .

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2 Cleaning process .
Plastic waste get cleaned and dried.

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3 Shredding process
Plastic waste shredded into small pieces . it must pass 4.75 mm sieve and it retain on
2.36 mm sieve .

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4 Collection process
Plastic waste retaining in 2.36 mm sieve is collected .

19. MIXING PROCEDURE AT HOT MIX PLANT:
Step I: Plastics waste like bags, bottles made out of PE and PP cut into a
size between 2.36 mm and 4.75mm using shredding machine.
Step II: The aggregate mix is heated to 165 0C and then it is transferred to
mixing chamber. Similarly the bitumen is to be heated up to a maximum of
160 0C. This is done so as to obtain a good binding and to prevent weak
bonding. During this process monitoring the temperature is very important.
Step III: At the mixing pan the shredded plastics waste is added over the
hot aggregate. It gets coated uniformly over the aggregate within 30 to 45
seconds. It gives an oily coated look to the aggregate.
Step IV: The plastics waste coated aggregate is mixed with hot bitumen.
Then this final resulted mix is used for laying roads. The road laying
temperature is between 110oC 120OC. The roller used should be of is 8-
ton capacity.
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21. Natural
sand
Fine
aggregates
Course
aggregates
Hopper
Cold
elevator
Dust
Collector
Hot
Elevator
Weight
box
Loaded in
truck
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22. COST COMPARISON
 The cost difference for the roads laid with compound as against
without it is Rs. 500 / Cubic Meter.
 Saving of 10% by weight of bitumen.
 Increase in compressive strength.
 Indirect tensile strength values increased by 3 times
 Provide smooth riding surface displaying much better
durability
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23. CONCLUSION:
1. Plastic coating on aggregates is used for the better performance of
roads.
2. This helps to have a better binding of bitumen with plastic wasted
coated aggregate.
3. The polymer coating also reduces the voids.
4. This prevents the moisture absorption and oxidation of bitumen by
entrapped air.
5. This has resulted in reducing rutting, raveling and there is no
pothole formation.
6. The roads can show better durability.
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24. Reference:
Savita Devi, Rupesh kumar ,Shad Ahmad, Jitendra Kumar Dhawan ,Premchand Yadav
“Partial Replacement of Bitumen by using Plastic Waste in Bitumen Concrete” SSRG
International Journal of Civil Engineering (SSRG-IJCE) – volume 3 Issue 7 – July 2016
Shweta N. Rokdey,P. L. Naktode, M. R. Nikhar “Use of Plastic Waste in Road Construction”
International Conference on Quality Up-gradation in Engineering, Science and Technology
(ICQUEST2015)
Sasane Neha .B, Gaikwad.Harish, Dr. J R Patil and Dr. S D Khandekar “APPLICATION OF
WASTE PLASTIC AS AN EFFECTIVE CONSTRUCTION MATERIAL IN FLEXIBLE
PAVEMENT”: International Research Journal of Engineering and Technology (IRJET)
Volume: 02 Issue: 03 | June-2015
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