Disposal of waste materials including waste plastic bags has become a serious problem and waste plastics are burnt for apparent disposal which cause environmental pollution. Utilization of waste plastic bags in bituminous mixes has proved that these enhance the properties of mix in addition to solving disposal problems. Plastic waste which is cleaned is cut into a size such that it passes through 2-3mm sieve using shredding machine. The aggregate mix is heated and the plastic is effectively coated over the aggregate. This plastic waste coated aggregate is mixed with hot bitumen and the resulted mix is used for road construction. The use of the innovative technology will not only strengthen the road construction but also increase the road life as well as will help to improve the environment. 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. In my research work I have done a thorough study on the methodology of using plastic waste in bituminous mixes and presented the various tests performed on aggregates and bitumen.
TESTS FOR AGGREGATE
Sieve Analysis of Aggregates
Specific Gravity & Water Absorption Test [IS: 2386 (Part 3) 1963]
Aggregate Impact Value Test [IS: 2386 (part 4) 1963]
Aggregate Crushing Value [IS: 2386 (Part 4) 1963]
Flakiness & Elongation Index Test [is: 2386 (part 1) 1963]
TESTS FOR BITUMEN
1 Penetration Test [Is: 1203-1978]
2 Softening Point Test [Is: 1205-1978]
3 Ductility Test [IS: 1208-1978]
4 Viscosity Test:
5 Flash Point and Fire Point
Plastic coating on aggregates is used for the better performance of roads. This helps to have a better binding of bitumen with plastic wasted coated aggregate due to increased bonding and increased area of contact between polymers and bitumen. The polymer coating also reduces the voids. This prevents the moisture absorption and oxidation of bitumen by entrapped air. This has resulted in reducing rutting, raveling and there is no pothole formation. The roads can withstand heavy traffic and show better durability. Following are some points which are drawn from the study:
Increased traffic conditions will and are reducing the life span of roads. Plastic roads are means of prevention and ultimately will be the cure. It will save millions of dollars in future and reduce the amount of resources used for construction.
1. It Proves To Be Ecofriendly.
2.Petrochemicals Can Be Saved.
3.Strength Of Aggregate Is Improved.
4.Water Absorption And Stripping Value Is Improved.
5.It Proves To Be Economical.