Topic: Laying of the Polymer Coated Bitumen Roads in Shillong.
department of management studies (dms)
MARTIN LUTHER CHRISTIAN UNIVERSITY
Laying of the Polymer Coated Bitumen Roads in Shillong.
Plastics wastes consisting of mainly polyolefin from items such as carry bags, cups, thermocoles and packaging films pose a major problem for their disposal. It is felt that these plastic waste needs to be recycled or reuse in order to avoid pollution problem. The study will therefore reveal how these plastics wastes can be used to make roads. Plastic waste was shredded into small size, i.e. 2 mm to 4 mm, molten and thereafter coated over hot aggregate at 1600C. Several roads have been built in this manner in the State of Tamil Nadu, Puducherry, Maharashtra, Kerala and Andhra Pradesh using polymer-coated–bitumen aggregate. In a first-of-its-kind move in the northeast, bitumen and waste plastic will be used for road construction in Shillong using a technology known for its durability, especially in extreme weather conditions. To start with, a four-km stretch in Jhalupara area of the city, which gets damaged every year due to heavy rains, will be re-constructed by Shillong Cantonment Board at an estimated cost of Rs30 lakhs. The CEO of the board, S Prabhakaran, informed that the board is approaching Madurai-based R. Vasudevan, the patented owner of the technology. He added it will be the same as of conventional bitumen mix but will have a longer lifespan To lay 1 km of plastic road 3.75 m wide, 9 tonne of bitumen and 1 tonne of waste plastic are required. A normal road requires 10 tonne bitumen for each kilometer. So a plastic road saves 1 tonne bitumen for every kilometer laid. Each tonne of bitumen costs Rs50,000 to Rs60,000.
We are thankful to Mr. S. Prabhakaran, the CEO of the Cantonment Board for his valued contribution for providing us with the necessary information on laying the first polymer coated bitumen road in Shillong. We are also thankful towards Mr. Sujit Das, the Sub Engineer of Cantonment Board, for showing us the process of making the plastic roads. We are also grateful towards Mr. D. Diengdoh, SDO (Central Sub-Division), PWD (Roads), Mr. Laso, Assistant Engineer, PWD (Roads), and Mr. Gilbert Laloo, the President of the Contractors’ Association of PWD (Roads) for sparing their valuable time in helping us to find out the problem. We are truly grateful towards Madam Rupa Bakor Kharshiing, our guide who helped us during the Quality Circles. We hope the report will be useful for road making agencies such as Municipal Corporations, The Public Works Departments (PWD), and National Highways Authorities etc. for using plastics waste in road laying/construction.
2) Future Status of Plastics Waste Roads in Shillong
3) Salient Features
4) Need of the Study
Chapter – 1
Plastics waste constitutes a significant portion of the total municipal solid waste (MSW) generated in India. It is estimated that approximately 10 thousand tons per day (TPD) of plastics waste is generated (i.e 9 % of 1.20 lakh TPD of MSW). Their visibility has been perceived as a serious problem and made plastics a target in the management of solid waste. Plastics are non-biodegradable. They also have very long lifetime and the burning of plastics waste under uncontrolled conditions could also lead to generation of many hazardous air pollutants (HAPs) depending upon the type of polymers and additives used. However, the end-of-life plastics can be recycled into a second life application but after every thermal treatment, degradation of plastics takes place to a certain extent. To address the plastics waste disposal issue, an attempt has been made to describe the possibilities of...