plastic in road construction
DESCRIPTION
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PLASTIC IN ROAD
CONSTRUCTIONPRESENTED BY
N. K. SONUNE
GUIDED BY
N. Y. BHORE(SIR)
GOVERNMENT POLYTECHNIC AMRAVATI
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GOVERNMENT POLYTECHNIC
AMRAVATI
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HOW THIS IDEA EMERGED?
Threats of bans on POLYBAGS in south India –Dirty polybags
Waste eyesore-landfills full up.
Realistic Situation-
-Raw materials scarce in INDIA .
-Economies of Asia-similar old disposal habits .
-Cost and price driven responses can survive.
-We firmly believe waste in only a resource in the wrong
places.
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OUTLINE
Introduction
About the plastics
Steps for using plastics
On site execution
Characteristic of waste plastic bitumen
Characteristic of plastic coated aggregate
Advantages
Disadvantages
Conclusion
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INTRODUCTION
Recent studies in this
direction have shown some
hope in terms of using
plastic-waste in road
construction.
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.
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INTRODUCTION
Plastic, Plastic, plastic…. What would we do without
them?
We use them all the time without thinking, whether
it’s for liquid, storing food or throughout our
automobile
The first vehicular bridge composed of an immiscible
polymer blend of polystyrene/high density PE
reinforced thermoplastic with rectangular cross
section was build at FORT LEONARD WOOD,
MISSOURI in 1998
A second vehicular bridge was constructed in NEW
BALTIMORE, NEW YORK in 1994 by society of
plastic engineer
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PLASTIC ROADS
(BANGALORE)
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WHAT IS PLASTIC?
A plastic material is any of a wide range of synthetic
or semi-synthetic organic amorphous solids
used in the manufacturing of industrial products.
Plastics are typically polymers of high molecular mass
and may contain other substances to improve performance
and/or reduce costs. Monomers of plastic are
either natural or synthetic organic compounds
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PLASTIC WASTE,
HARMFULL TO EARTH
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STEPS FOR USING PLASTICS
IN ROADS:-
1. Segregation.
2. Cleaning process.
3. Shredding process.
4. Collection process.
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1) SEGREGATION-
Plastic waste collected from various sources
must be separated from other waste.
Maximum thickness of 60 microns.
2) CLEANING PROCESS-
Plastic waste get cleaned and dried.
SEGREGATION
PROCESSCLEANING PROCESS
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3) SHREDDING PROCESS-
Different types of plastic wastes are mixed together and
Plastics gets shredded or cut into small piece.
4) COLLECTION PROCESS -
Then plastic waste retaining in 2.36 mm is collected.
COLLECTED PLASTICSHREDDING PROCESS
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ON SITE EXECUTION
There are two type of execution
1. WET PROCESS
2. DRY PROCESS
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WET PROCESS
Blending of waste plastics by direct mixing
of shredded plastics with hot bitumen at 160°C
Mechanical stirrer is needed as the mixing is
difficult because of difference in viscosities of
molten polymer and bitumen.
Addition of stabilizers and proper cooling are
required.
Since the wet process require a lot of
investment and bigger plants
Not commonly used..
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DRY PROCESS
This process is developed by Dr. Vasudevan.
The aggregate is heated to 170°C in the Mini hot Mix Plant .
AGGREGATE TRANSFERRED TO
PUDDLING CHAMBERMINI HOT MIX PLANT
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The shredded plastic waste is added in equal
proportion.
WASTE PLASTICS MIXED WITH THE HOT
AGGREGATES
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WASTE PLASTICS MIXED WITH THE HOT
AGGREGATES
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COATED AGGREGATE PLAIN AGGREGATE
This plastics gets coated over the aggregate
uniformly.
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BITUMEN IS ADDED WITH
COATED AGGREGATEAGGREAGTE PALSTIC BITUMEN
MIX
• Immediately the hot Bitumen at 160°C is added
with the mixture.
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The mixture is transferred to the road and the
road is laid.
Road is being laid
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CHARACTERISTIC OF PLASTICS
COATED AGGREGATE
Los Angel’s Abrasion Test –
Wear and tear values of plastic coated aggregate if found to be decreasing while using plastics.
Eg. 37% without plastic, 32% with 1% plastic, 29% with 2% plastic.
Soundness Test-
The plastic coated aggregate, did not show any weight loss, hence improve the quality of the aggregate.
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ADVANTAGES
Simple process, no new machinery is required
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, no toxic gas evaluation.
Reduced penetration and ductility, a higher softening point, resist the permeation of water and cold cracking.
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DISADVANTAGAES OF PLASTIC
ROADS
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.
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COMPARISION BETWEEN
TAR & PLASTIC ROAD
TAR ROAD PLASTIC ROAD
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Trisool Road (Tamil Nadu)
Laid in April 2004
Photo date Jan 2007
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Jubilee Park Road (Jamshedpur)
Laid in Jan 2005
Photo date Aug 2010
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CONCLUSION
Plastic will increase the melting point of the bitumen.
Use of the innovative technology not only strengthened the road construction but also increased the road life.
Help to improve the environment (eco-friendly).
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.
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