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There has been increasing interest in the use of recycled polymer composites as a replacement for timber piling in coastal and waterfront environments. This trend is expected to grow because polymeric piling is more attractive than timber when life cycle costs are factored in, and also because polymeric piling is a creative method for the recycling and reuse of tons of plastic waste. However, composites face obstacles because they do not have a long track record of use in civil engineering structures. Polymeric piling is typically made of high density polyethylene (HDPE) and reinforced with fiber reinforced polymer E-glass (FRP) or steel. This paper summarizes the current state of the art in polymeric piling practice, including (1) the mechanical properties of piling made of recycled polymers; (2) the durability of recycled polymers in aggressive soils; (3) the compressive creep of recycled HDPE and FRP; (4) drivability; (5) design considerations such as skin friction, end bearing, and buckling; and (6) load testing of polymeric piles.
polymeric piling, plastic piles, FRP, durability, creep, strength, driveability, load test
Iskander, Magued G.
Professor, Polytechnic Institute of New York Univ., Brooklyn, NY