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| Last Updated:25/06/2018

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State to use plastic waste in road construction

 Source: Imphal Free Press.

IMPHAL | Jun 5 : In a bid to curb the menace of plastic waste, Manipur is planning to use plastic waste in construction of roads. Manipur would become second in the Northeast after Meghalaya, to use plastic waste in road construction. As a result of rapid growth of the urban population coupled with the changing lifestyles of the people, the municipal solid waste generated daily has increased in the state. As per Census 2011, the growth rate of population in Manipur in the last decade is 18.6 percent (Rural 9.1 percent; Urban 44.8percent). The date further shows that in terms of percentage, the rural population constitutes 67.5 percent and Urban population 32.5 percent of the total population. However the growth rate of urban population in the state stands at 44.8percent as against the rural growth rate of 9.1 percent. Subsequently, the rapid growth has considerably contributed to the increase of solid waste particularly in Imphal city. As per official data, the Imphal municipal area generates 130-150 metric ton of solid waste every day while other urban local bodies generates below 5 metric ton. It is learnt that 5 percent of the total waste is that of plastic. The Manipur Pollution Control Board (MPCB) has set in motion plans to curb plastic menace of which use of plastic waste in road construction is its priority. The MPCB on May 24, has sent a written intimation to the Manipur works department giving instruction to make it mandatory the use of plastic waste in construction of roads in the state, said Laishram Radhakishore, chairman MPCB. To feed this initiative the MPCB would establish plastic collection centres in five valley districts within the current months, he added. According to the chairman, at the proposed centres any individual can sell plastic waste at Rs. 9 to 15 per kg based on the quality of the products. It is learnt that the proposed centres would be outsourced to private companies or individuals under Public Private Partnership (PPP) model. Th. Ibotomba Singh, principal director CIPET, Imphal, said “plastics waste is collected and segregated from mixed solid waste. The dried plastics waste is shredded to 2-4 mm size and added to heated stone aggregate followed by mixing. Further, the coated aggregate is mixed with hot bitumen, which is used for laying and compaction”. Road constructed using plastic waste is stronger with increased marshal stability value besides better resistance towards rain water and water stagnation. For 1 km x 3.75 m road, 1 ton of plastic is used, which leads to saving of 1 ton of bitumen, Cost of road construction is decreased due to saving of bitumen, he added.