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Thermoplastic recyclates find newer applications in Civil Construction
 

Structural rail road ties from thermoplastic recyclates have been in existence over a couple of years. Polymer scientists have been developing newer applications of recyclates, such as telephone utility poles and several highway products.

Rutgers University of New Jersey, USA in collaboration with Polywood Inc., have developed a 15 feet wide and 46 feet long bridge weighing almost 14 MT using I-Beams and decking profiles made from recyclate material. This recyclate contained 65% HDPE waste derived from milk jugs and 35% of PS derived from peanut packing material .

The composite can withstand more than 200 kg/cm2 of force, enough to support a truck on the bridge. This bridge has been constructed in November 2002 on Mullica river in the forest located in the Southern New Jersey.

The I Beams used in the bridge have been produced by 'Intrusion Moulding', a form of extrusion in which the extruder discharges molten material into a series of moulds.

The bridge, a new example of increasing usage of recyclates in civil construction, is expected to enjoy a longer life compared to wood, since it would not chip or rot.

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