Techniques Used to Recycle Plastic Construction Waste

by CCB Today | Monday, Nov 5, 2018 | 176 views

construction site recyclingThere are various waste materials in a building site. One of the frequently overlooked material types is plastic. Though minimal compared to metal and wood, plastic waste still makes up about 10% of construction and demolition waste.

The plastic waste comes from floors, construction filling material, plumbing and other objects in building projects. There are currently different techniques used by construction waste management agencies to recycle plastic construction waste.

These processes reduce the manufacturing costs of new plastic products and consequently reduce the cost of plastic items. Here are some of these processes.

Mechanical Recycling

This option is suitable for unchanged plastic waste. The waste is sorted to remove its impurities, after which it is shredded and cleaned. The plastic is then crushed into pellets or flakes then sent to textile and sheet-making factories. Here, the plastic is melted down then made into fabrics or new products.

Chemical Recycling

There are two plastic chemical recycling techniques, including feedstock recycling and monomerisation. In monomerisation, plastic waste is broken down into single monomers using ethylene glycol or methanol. In feedstock recycling, plastic is broken down into its base constituents.

The eventual product is however used as a reducing agent or fuel for industrial processes rather than making new plastic products.

Thermal Recycling

This option utilises heat for breaking down plastic waste. There are different plastic thermal recycling techniques with gasification and liquification being the most common. Both processes revert the plastic to petroleum used for energy in residential and commercial establishments.

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PET, HDPE, PVC, polypropylene, and polystyrene are the common types of plastic waste generated in demolition and construction projects. With the above recycling options, the plastic waste can be efficiently managed.

This makes your project eco-sustainable which can prove a crucial selling point for your company to prospective customers in the future.

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