It's a presentation on road construction in which plastic wastes are used.

1. Plastic roads
PLASTIC ROADS
“A presentation on road construction in
which plastic wastes are used”
DEPARTMENT OF CIVIL ENGINEERING
CMR COLLEGE OF ENGINEERING AND
TECHNOLOGY
KANDLAKOYA (V), MEDCHAL ROAD
HYDERABAD - 501 401
By,
G.C.SAIKRISHNA,

2. Plastic Roads
A Long lasting road from waste plastic
for a better and green world….

3. Contents-:
• Introduction
• What are plastic roads?
• Need of study
• Concept of plastic roads
• Material used
• Construction process
• Field trials
• Comparison between ordinary road and plastic
road
• Advantages of plastic roads
• Disadvantages of plastic roads
• Waste plastic roads in India
• conclusion

4. Introduction-:
 Disposal of waste plastic is a major problem .It is non-
biodegradable & It mainly consists of low-density
polyethylene .
 Burning of these waste plastic bags causes
environmental pollution.
 To find its utility in bituminous mixes for road
construction , Laboratory performance studies were
conducted on bituminous mixes .
 Laboratory studies proved that waste plastic enhances
the property of the mix .
 Improvement in properties of bituminous mix
provides the solution for disposal in an useful way.

5.  Plastic roads mainly use plastic carry
bags, disposable cups and 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.

6. What are waste plastic roads?
The roads constructed using waste plastic, popularly
known
as Plastic Roads, are found to perform better
compared
to those constructed with conventional bitumen.
1)The Indian Centre for Plastics in the
Environment (ICPE) has been promoting the use of
plastic waste to construct asphalt roads.
2) A few trial roads have been paved successfully by
combining waste plastic with bitumen.

7. NEED OF STUDY
1)Disposal of waste plastic is a major problem.
Waste Plastic dumped on roads
2)It is non-biodegradable.
3)It mainly consists of low-density polyethylene.

8. 4)To find its utility in bituminous mixes for road
construction.
5)Burning of these waste plastic bags causes
environmental pollution.
6)Laboratory performance studies were conducted on
bituminous mixes.
7)studies proved that waste plastic enhances the property
of the mix.
8)Improvement in properties of bituminous mix provides
the solution for disposal in an useful way.

9.  AGGREGATE:-
 Aggregate of 20mm, 10 mm.
 Stone Dust and Lime as Filler
 BITUMEN:-
 60/70,80/100grade bitumen.
 WASTE PLASTIC:-
 Waste plastic in the shredded form.(PVC is not
Used)

10. 1. Segregation .
2. Cleaning process .
3. Shredding process .
4. Collection process .
10

11. › plastic waste collected from various sources
must be separated from other waste.
› Maximum thickness of 60 microns.
SEGREGATION PROCESS
11

12.  Plastic waste get cleaned and dried.
cleaning process
12

13.  will be shredded or cut into small piece.
 the different types of plastic wastes are
mixed together
shredding process
13

14.  the plastic waste retaining in 2.36 mm is
collected.
collected plastic
14

15. Step 1-: Plastics waste (bags ,cups , bottles ) made out of PE,PP and PS cut
into a size between 2.36mm and 4.75mm using shredding machine.
Step 2-:
The aggregate mix is heated to 165°c (as per the HRS specification) and
transferred to mixing chamber. Amount of plastic to be added is @8% of bitumen.

16. STEP 3-:
 Similarly the bitumen is to be heated up to a maximum of 160°c (HRS Specification) to have
good binding and to prevent weak bonding. (Monitoring the temperature is very important).
 Step 4-: At the mixing chamber, the shredded plastics waste is to be added. It
get coated uniformly over the aggregate within 30 to 60 seconds, giving an oily
look.

17. Step 5-:
• The plastics waste coated aggregate is mixed with got bitumen and the resulted mix is used for road
construction. The roller used is 8-ton capacity.
• Step 6-: The road laying temperature is between 110°c to 120 °c. And the rollers are used have
capacity 8- ton generally.

18. Overall process-:

19. Field trials
There are two type of field trials-:
1. DRY PROCESS
2.WET PROCESS
1.DRY PROCESS-:
 The aggregate is heated to 170°C in the Mini hot Mix Plant .
 Heated aggregates
 The shredded plastic waste is added in equal proportion.
 Adding shredded plastic .
2.Wet Process-:
 Waste plastics by direct mixing with hot bitumen at 160°C.
 Mechanical stirrer is needed.
 Addition of stabilizers and proper cooling.
 Since the wet process require a lot of investment and bigger plants.
 Not commonly used.

20. CONVENTIONAL
PRACTICE
Vs
MODIFIED PRACTICE
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21. MATERIALS & METHODS
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22. AGGREGATE SELECTION
STRENGTH
HARDNESS
TOUGHNESS
DURABILITY
SHAPE OF
AGGREGATES
SPECIFIC GRAVITY
AND WATER
ABSORPTION
AGGREGATE
CRUSHING TEST
AGGREGATE IMPACT
TEST
ABRASION TEST
SHAPE TESTS
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23. AGGREGATE PROPERTIES
PROPERTIES OBSERVATIONS
MORTH
Specifications
SPECIFIC GRAVITY 2.62
FLAKINESS INDEX 15.7%
MAX 30%
(Combined)
ELONGATION INDEX 18.08%
COMBINED INDEX 29.84%
ANGULARITY NUMBER 9
IMPACT VALUE 17% MAX 24%
CRUSHING VALUE 20.15%
ABRASION VALUE 20.80% MAX 30%
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24. TESTS ON BITUMEN

25. BITUMEN PROPERTIES
PENETRATION 83
SPECIFIC GRAVITY 0.99
SOFTENING POINT 47⁰C
DUCTILITY 78cm
FLASH POINT 280⁰C
FIRE POINT 320⁰C
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26. MARSHALL MIX DESIGN
CONCEPT OF PHASE DIAGRAM18-04-13 GTR 236 26

27. MARSHAL SPECIMENS
• HEIGHT 6.35 cm
• DIAMETER 10.16cm
• WEIGHT OF HAMMER 4.54kg
• HEIGHT OF FALL 45.7cm
• NO. OF BLOWS TO BE
GIVEN ON EACH FACE 75
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28. MARSHALL TEST PROCEDURE
18-04-13 GTR 236 28

29. MARSHALL TEST PROCEDURE
18-04-13 GTR 236 29

30. MARSHALL TESTING APPARATUS
18-04-13 GTR 236 30

31. OBC CALCULATIONS
18-04-13 GTR 236 31

32. Effects of Plastic waste on
Bituminous Mixes
STABILITY
DURABILITY
FLEXIBILITY
WORKABILITY
ECONOMIC CONCERNS
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33. OPTIMUM PLASTIC CONTENT
S
A
M
P
L
E
1
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34. OPTIMUM PLASTIC CONTENT
S
A
M
P
L
E
2
18-04-13 GTR 236 34

35. SUPERIMPOSED MARSHALL STABILITY GRAPH
PROPERTIES
CONVENTIONAL
MIX
MODIFIED MIX MODIFIED MIX MORTH
PET SAMPLE 1 PET SAMPLE 2 STANDARDS
MARSHALL STABILITY (in kg) 1650 2900 2390 Min 900
Flow value (0.25mm units) 450 780 750 800-1600
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36. Comparison of Mixes
18-04-13 GTR 236 36

37. 18-04-13 GTR 236 37

38. Comparison of tensile strength
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39. After rutting test
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40. CONCLUSIONS AFTER COMPARISONS
• INCREASED MARSHALL STABILITY VALUE.
• OPTIMUM PLASTIC CONTENT.
• INCREASE IN DENSITY WITH INCREASE IN
PLASTIC CONTENT.
• INCREASED DURABILITY.
• RECYCLING OF WASTE PLASTIC.
• ECONOMICAL.
18-04-13 GTR 236 40

41. COMPARISON BETWEEN ORDINARY BITUMINOUS ROADS AND WASTE PLASTIC BITUMINOUS
ROADS:-
S.No. Properties Plastic Road Ordinary Road
1. MARSHALL STABILITY VALUE MORE LESS
2. BINDING PROPERTY BETTER GOOD
3. SOFTENING POINT LESS MORE
4. PENETRATION VALUE MORE LESS
5. TENSILE STRENGTH HIGH LESS
6. RUTTING LESS MORE
7. STRIPPING(POT HOLES) NO MORE
8. SEEPAGE OF WATER NO YES
9 DURABILITY OF THE ROADS BETTER GOOD
10. COST OF PAVEMENT LESS NORMAL
11. MAINTENANCE COST ALMOST NIL MORE
12. ENVIRONMENT FRIENDLY YES NO

42. ADVANTAGE OF WASTE PLASTIC BITUMINOUS MIX-:
 1) Stronger road with increased Marshall StabilityValue.
 2) Better resistance towards rain water and water stagnation.
 3) No stripping and no potholes.
 4) Increase binding and better bonding of the mix.
 5) Reduction in pores in aggregate and hence less rutting and
raveling.
 6) No leaching of plastics.
 7) No effect of radiation like UV.

43.  8)The strength of the road is increased by 100%.
 9)The load withstanding property increases. It helps to satisfy today’s need
of increased road transport.
 10) For 1km X 3.75m road, 1 ton of plastic (10 lakh carry bags) is used and 1
ton of bitumen is saved.
 11)Value addition to the waste plastics (cost per kilogram increases from Rs 4
to Rs12).
 12)The cost of road construction is also decreased.
 13)The maintenance cost of road is almost nil.
 14)Disposal of waste plastic will no longer be a problem.
 15)The use of waste plastics on the road has helped to provide better place
for burying the plastic waste without causing disposal problem.

44. BENEFITS OF WASTE PLASTIC ROADS:-
Environmental benefits
MSWM (Municipal Solid Waste Management)
Employment Generation
Farming Community
National Economy

45. 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 -:
It is opined that the first rain will trigger leaching. As the
plastics will merely form a sticky layer, (mechanical
abrasion).
The components of the road, once it has been laid, are
not inert.

46. •WASTE PLASTIC ROADS CONSTRUCTED:-
 The Bruhat Bengaluru Mahanagara Palike (BBMP) has used plastic on about 600 km
of roads, including many thoroughfares and arterial roads.
 It uses the plastic blend in at least 25% of the road-laying works, including the
present project to upgrade about 45 roads in the city.
 The plastic model was successful on major roads in Bangalore, including -:
 Shankar Mutt Road,
 K H Road,
 M G Road (towards Trinity Circle),
 J C Nagar Road ,
 Miller's Road and Cunningham Road,
 inner ring road,
 Rajarajeshwari Junction,
 Mysore Bangalore state highway.
Puttanna Chetty Town Hall 

47. Manipal Road
Dollars colony
Banglore-mysore state Highway

48. .
M G Road (towards Trinity Circle)
The experimentation at several institutes indicated that the waste plastic, when added to hot aggregate will
form a fine coat of plastic over the aggregate and 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.
Therefore, it is proposed that we may use waste plastic in the construction of Roads.

49. CONCLUSION:-
 Evidence of Better Performance of the Plastic Tar Roads-:
The performance studies carried out on the roads constructed in
Tamil Nadu indicated satisfactory performance with good skid resistance, good
texture value, stronger and less amount of progressive unevenness over a period of
time.
 The experimentation carried out by CRRI also indicated better stability value,
indicating higher strength, less flow and more air voids.

50.  The use of the innovative technology not only strengthened
the road construction but also increased the road life as well as
will help to improve the environment and also creating a source
of income.
Plastic roads would be a boon for India’s hot and extremely
humid climate, 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 relieve the earth from all type of
plastic-waste .
Hence the use of waste plastics for pavement is one of the best
methods for easy disposal of waste plastics.

51. Plastic roads,
a simple way to make eco-friendly constructions……