In the realm of engineering materials, plastic-steel sheet piles have engaged in a comprehensive performance comparison with traditional concrete and steel sheet piles, with the results highlighting their absolute advantages as a green building material

From an environmental perspective, the production of concrete emits approximately 0.8 tons of carbon dioxide per cubic meter, whereas plastic-steel sheet piles are made from recycled polymer materials, resulting in carbon emissions that are only one-tenth of those from concrete; Steel sheet piles corrode during use, and the resulting rust can contaminate soil and water, whereas plastic-steel sheet piles are resistant to acid and alkali corrosion and release no pollutants throughout their entire lifecycle

In terms of performance, the flexural strength of plastic-steel sheet piles can reach 65 MPa. Although this is slightly lower than that of steel sheet piles, their U-shaped cross-section design enables lateral bending resistance comparable to that of steel sheet piles; In terms of weather resistance, they retain their elasticity even at temperatures as low as -40°C, avoiding the frost heave and cracking typical of concrete piles, and do not warp or rot like wood when exposed to high temperatures and intense sunlight

More importantly, plastic-steel sheet piles are reusable; they can be fully extracted after project completion with a recycling rate exceeding 95%. In contrast, concrete piles can only be landfilled as construction waste after removal, while steel sheet piles suffer severe rusting upon removal, resulting in a reuse rate of less than 30%. The outcome of this comparison suggests that green building materials will ultimately become the mainstream in future construction projects.