BITUMEN MODIFIED WITH PLASTIC WASTE & CRUMB RUBBER

1. “
”
Jis college of engineering
civil engineering department
Modification of bitumen by wasteplastic
PREPARED BY-
BISHAL SARKAR
ROLL NO:-140308128
REG NO:-141230120044
DEPERTMENT:-CIVIL ENGINEERING(4TH YEAR)

2. CONTENTS
 Introduction
 What are plastic roads?
 Major Factors Responsible for Failure of Roads
 Bitumen
 Need of study
 Material used
 Construction of Plastic Road
 Field trials
 Advantages of plastic roads
 Disadvantages of plastic roads
 New Thinking & New Possibilities
 Conclusion
 Referrnces

3. INTRODUCTION
 Growth in industries and population together has resulted in production of
various types of waste materials.
 The creation and disposal of non-decaying waste materials such as Fly-ash,
Steel Slag, Scrap Tyres, Plastics etc. have been posing difficult problems.
 Considerable work has been done in various countries for the disposal of some
of these waste products and utilisation of some other products.
 There is a long list of published literature dealing with different aspects of
these challenging problems.

4. 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 Center for Plastic 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.

5. MAJOR FACTORS RESPONSIBLE FOR FAILURE OF ROADS
 Overloaded commercial vehicles.
 Improper design of roads.
 Improper construction of roads.
 Improper specifications.
 Drainage & soil subgrade conditions.
 Aging of bitumen.

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

7. BITUMEN
Bitumen is hydrocarbon material of either natural or pyrogenous
origin found in gaseous, liquid, semi-solid or solid form & is
completely soluable in carbon di-sulphide, carbon tetra-chloride.
Bitumens can be majorly classified into 2 types ---
a) Paving grade bitumen : Used for construction of roads &
airfields.
b) Industrial grade bitumen : Water proofing of structures
& industrial floors etc.

8. Needof study
1)Disposal of waste plastic is a major problem
2)It is non-biodegradable.
3)It mainly consists of low-density polyethylene.
Waste Plastic dumped on roads

9. 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.

10. MATERIALS USED:
AGGREGATE:-
 Aggregate of 20mm, 10 mm.
 Stone Dust and Lime as Filler.
BITUMEN:-
 60/70,80/100 grade bitumen.

11. WASTEPLASTIC:-
Waste plastic in the shredded form are used.

12. Construction of plastic roads
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.
Shredding Shredded Plastics

13. 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.
Similarly the bitumen is to be heated up to a maximum of
160°c (HRS Specification) to have good binding property.
(Monitoring the temperature is very important).

14. Heating Of Aggregates

15. Step 3:
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
Addition of shredded Plastics Coated aggregates

16. Step 4
The plastics waste coated aggregate is mixed with hot bitumen and the resulted mix
is used for road construction.
The road laying temperature is between 110°c to 120°c. The roller used is 8-ton
capacity.
Adding of Bitumen

17. Mixing Laying and Compaction

18. 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 .
 The shredded plastic waste is added in equal proportion.
 Immediately the hot Bitumen 60/70 or 80/100 grade (160°C) is added.
 The mixture is transferred to the road and the road is laid.
 Waste plastics by direct mixing with hot bitumen at 160°C.

19. Wet Process:-
 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. ADVANTAGE OF USING MODIFIEDBITUMEN:-
 Stronger road with increased Marshall Stability Value.
 Better resistance towards rain water and water stagnation.
 No stripping and no potholes.
 Increase binding and better bonding of the mix.
 Reduction in pores in aggregate and hence less rutting and raveling.
 Generate jobs for rag pickers.

21. The strength of the road is increased by 100%.
For 1km X 3.75m road, 1 ton of plastic (10 lakh carry bags) is used and 1
ton of bitumen is saved.
Value addition to the waste plastics (cost per kilogram increases from Rs
4 to Rs12).
 Reduce the cost to around Rs. 5000/Km. of single lane road.
 The maintenance cost of road is almost nil.
Disposal of waste plastic will no longer be a problem

22. DISADVANTAGES OF PLASTIC ROAD
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

23. New Thinking & New Possibilities
 We can’t imagine a world without plastic
 And from now we should have to start looking at plastic as
sustainable resource rather than a waste.
 The Govt. has to take initiative & make the use of waste plastic
mandatory

24. CONCLUSION
 Plastic will increase the melting point of the bitumen.
 Help to improve the environment.
 Plastic roads would be a boon for India’s hot and extremely
humid climate, leaving most of the roads with big potholes.
 Waste plastics when mixed with binder is found to give higher
strength, higher resistance to water and better performance.

25. REFERRNCES
 www.slideshare.net/nitesnitw/polymer-modified-bitumen
 www.sciencedirect.com
 www.environmentportal.in
 www.wikipedia.org