The document discusses the utilization of waste plastic in road construction. It describes how plastic waste like carry bags and bottles can be collected, cleaned, shredded and mixed with hot bitumen to form a coating over aggregates. This coated mixture is then laid on the road like a normal tar road. The dry process involves heating aggregates to 170°C and mixing shredded plastic waste before adding hot bitumen. Using plastic waste in roads can increase strength, reduce costs, and help dispose of plastic waste in an environmentally friendly manner. However, there are also disadvantages like toxic chemicals leaching during the cleaning and road laying processes.

1. UTILIZATION OF WASTE PLASTIC IN
ROAD CONSTRUCTION
ANNAMACHARYA INSTITUTE OF
TECHNOLOGY AND SCIENCES

2. INTRODUCTION
Recent studies in this
direction have shown some
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 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.

3. PLASTIC ROADS
(BANGALORE)

4. 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 perfo-
-rmance and/or reduce costs. Monomers of plastic are
either natural or synthetic organic compounds
Discarded thin-plastic carry-bags are a menace.
In town they clog drains, cause flooding, choke
animals that eat them and are unsightly.

5. PLASTIC WASTE,
HARMFULL TO EARTH

6. STEPS FOR USING PLASTICS
IN ROADS:-
1. Segregation.
2. Cleaning process.
3. Shredding process.
4. Collection process.

7. 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
PROCESS
CLEANING PROCESS

8. 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

9. ON SITE EXECUTION
There are two type of execution
 1. WET PROCESS
 2. DRY PROCESS

10. 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..

11. 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 CHAMBER
MINI HOT MIX PLANT

12.  The shredded plastic waste is added in equal
proportion.
WASTE PLASTICS MIXED WITH THE HOT
AGGREGATES

13. COATED AGGREGATE PLAIN AGGREGATE
 This plastics gets coated over the aggregate
uniformly.

14. BITUMEN IS ADDED WITH
COATED AGGREGATE
AGGREAGTE PALSTIC BITUMEN
MIX
• Immediately the hot Bitumen at 160°C is added
with the mixture.

15.  The mixture is transferred to the road and the
road is laid.
Road is being laid

16. CHARACTERISTIC OF POLYMER
MODIFIED BITUMEN
% of Plastics Ductility(cm) Penetration(mm) Softening
Point(oC)
1% 64 95 54
2% 55 90 50
3% 20 80 50
5% 11 55 72
10% 7 NIL 75
Use of higher percentage of plastics in
polymer modified bitumen is not favorable.

17. 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.

18. 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.

19. 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.

22. 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.

23. a simple way to make echo friendly
constructions.