Final year seminar

1. PLASTIC ROADS
Presented by:
MANOJ KUMAR NS
1CR15CV043
Under the Guidance :
Mr NARENDRA KUMAR FATEHPURIA

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Content
➡ INTRODUCTION TO PLASTIC ROAD
➡ NEED FOR THE STUDY
➡ WHAT IS PLASTIC
➡ ADVANTAGES & DIS-ADVANTAGES
➡ CHARACTERISTICS OF PLASTIC WASTE:
➡ RAW MATERIALS
➡ METHODOLOGY
➡ PROCEDURE
➡ CONCLUSION
➡
REFERENCES

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INTRODUCTION TO PLASTIC ROAD
 Recent studies in the direction have shown 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 (polyethylene terephthalate) 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 mixture is laid in
the road surface like a normal tar road.
3

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NEED FOR THE STUDY
❖ To reduce the disposal problem of plastics.
❖ Reduce environmental pollution caused by plastic waste.
❖ To identify the optimum proportion of waste plastic to be added in the bitumen mix for getting the
required strength.
❖ Promote best usage of plastic waste for road construction thereby improving its durability, quality and
performance.
❖ Burning of these waste plastic bags causes environmental pollution.

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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.
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.

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CHARACTERISTICS OF PLASTIC WASTE:
Thermal Study:
‣ At 130-1400C :- polyethylene, polypropylene, polystyrene, get softened easily without any evolution of gas.
‣ At 3500C :- get decomposed releasing gases like methane, ethane etc.
‣ At 7000C :- they undergo combustion, producing gases like CO and CO2.
Binding Property:
‣ The molten plastic waste inhibits good binding property.
‣ There will be no stripping at all.

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RAW MATERIALS

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WET PROCESS

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DRY PROCESS Advantages of dry process
1. Plastic is coated over stones - improving surface
property of aggregates.
2. Coating is easy & temperature required is same as
road laying temp.
3. Used waste should be 6-8 percent by weight of bitumen
depending on the climatic conditions of high and low
rainfall areas.
4. Doubles the binding property of aggregates.
A FLOW CHART DEMONSTRATING THE ‘DRY PROCESS’OF MAKING
PLASTIC BITUMEN ROAD MATERIAL
5. No new equipment is required.

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PROCEDURE
STEP 1 :-

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STEP 2 :-
The aggregate mix is heated to 170°c and transferred to mixing chamber. Amount of plastic to be added is
6-8 % of bitumen weight.
AGGREGATE TRANSFERRED TO PUDDLING
CHAMBER
MINI HOT MIX PLANT

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STEP 3 :-
Similarly the bitumen is to be heated up to a maximum of 160°c to have good binding and to prevent weak
bonding.This plastics gets coated over the aggregate uniformly.
WASTE PLASTICS MIXED WITH THE HOT
AGGREGATES

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STEP 4 :-
Immediately the hot Bitumen at 160°C is added with the mixture of plastic coated aggregates.
AGGREGATE PLASTIC BITUMEN BITUMEN IS ADDED WITH COATED
MIX AGGREGATE

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STEP 5 :-
This mixture is transferred to the road and the road is laid.
ROAD IS BEING LAID

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ADVANTAGES
❖ This is a very simple technology which does not involve any special machines deployment or other advanced
skilled professionals.
❖ There is spot use of the waste plastic.
❖ These water proof roads provide considerably increases durability.
❖ No stripping of roads happens as this kind of roads resist the percolation of water.
❖ More employment can be generated as labours will be required in collection, segregation and shredding of waste
plastics.
❖ No maintenance will be required for years as the surface remains without any cracking or potholes.

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DIS-ADVANTAGES
❖ Cleaning process
Toxics present in the co-mingled plastic waste would start leaching.
❖ During the road laying process
If there is presence of chlorine, it will definitely release noxious HCL gas.
❖ After the road laying
The components of the road are not inert.

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CONCLUSION
❖ The use of the innovative technology not only strengthens the road construction, but also
increases the road life as well as help to improve the environment and also creating a
source of income.
❖ Plastics will increase the melting point of the bitumen.
❖ Plastic roads would be a boon for India’s hot and extremely humid climate, where temperatures frequently
cross 50°C and torrential rains create havoc, leaving most of the roads with big potholes.
It is hoped that in near future we will have strong, durable and eco friendly roads which will relive the earth
from all types of plastic waste.

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REFERENCES
❖ R. Vasudevan. (2011) “A technique to dispose waste plastics in an ecofriendly way - Application in construction of
flexible pavements” Construction and Building Materials Vol. 8 Department of Chemistry, Thiagarajar College of
Engineering, Madurai, Tamil Nadu, India, pp 311-320.
❖ Miss Apurva J Chavan - Use of plastic waste in flexible Pavements -ISSN 2319 - 4847, Volume 2, Issue 4, April
2013
❖ S.S.Verma - Roads from plastic waste - The Indian Concrete Journal - November 2008
❖ Kshitij Aditeya Singh -Use of Plastics in Road Construction Implementation of Technology and Roll out - CENTRE
FOR INNOVATIONS IN PUBLIC SYSTEMS November 2014
❖ IRC:SP:98-2013 GuidLINES FOR THE USEOF WASTE PLASTIC IN HOT BITUMINOUS MIXES (DRY
PROCESS) IN WEARING COURSES