Plasma Pyrolysis Technology
Polymer Blended Bitumen Roads Co-processing in Cement Kiln
Fig.1 Plastic Waste Management
3.0 New Technology for Plastic Waste Management
3.1 Polymer Blended Bitumen Roads The process of road laying using waste plastics is designed and the technique is being implemented successfully for the construction of flexible roads at various
places in India. A brief description is given below followed by a detailed description. Brief description
Plastic waste collection, segregation & storage.
Cleaning & drying of Plastic waste .
Shredding plastic waste into required size (2 to 4 mm).
The coated aggregate is mixed Shredded polymer waste (5-10% w/w) is Stone aggregate (granite, with hot bitumen at temperature added to heated stone aggregate for 30- ceramic) heated to around 40 sec and mixed for uniform coating at 160°C-170°C. ranges from 155°C-163°C. surface of aggregate
The mix (composite) known as waste plastic- aggregatebitumen mix (130°C-140°C). This composite used for road laying at temperature between 110°C-130°C.
3.1.1 Merits of Polymer Blended Bitumen Roads • Stripping and pothole formation: Bitumen film is often stripped off the aggregates because of the penetration of water, which results in pothole formation. This is accelerated during the movement of vehicle. When polymer is coated over aggregate, the coating reduces its affinity for water due to non-wetting nature of the polymer and this resists the penetration of water. Hence the penetration of water is reduced which resists stripping and hence no pothole formation takes place on these roads. • Leaching: Polymer will not leach out of the bitumen layer, even after laying the road using waste plastics-bitumen-aggregate mix.
Effect of Bleeding: Waste polymer-bitumen blend shows higher softening temperature. This increase will reduce the bleeding of bitumen during the summers.
Effect of fly ash: It is also observed that the fly ash does not leach from this mixture.
3.1.2 Demerits of Polymer Blended Bitumen Roads There is no observable demerit either in this process or in the road characteristics. For the past 2 years various roads laid using waste plastics are functioning well.
3.2 Co-processing of Plastic waste in Cement Kiln 3.2.1 Operating Manual for Co-processing of Plastic Waste in Cement Kilns 3.2.2 Introduction Plastic waste generated from different cities and towns is a part of municipal solid waste (MSW). It is a matter of concern that disposal of plastic waste is causing many problems such as leaching impact on land and ground water, choking of drains, making land infertile, indiscriminate burning causing environmental hazards etc. Plastics waste being non-biodegradable is littered in most of the cities/towns and their-by giving an ugly appearance. It is estimated approximately 15,342 tons/day (TPD) of plastic waste (on per capita basis) is generated in the country. To get rid of plastic waste disposal problems, Central Pollution Control Board (CPCB) in association with MP Pollution Control Board has taken initiative to use the plastic waste in cement plant at ACC Kymore (Katni, MP). The stack monitoring result revealed that emission values are found below the standard set for Common Hazardous Waste...