This is how American recycling companies turn old wind turbine blades into cement

Wind turbines are ideal for producing clean energy, but their life cycle is around 20 to 30 years at most. Most of the turbine is recyclable, and old turbines are even a source of rare earth minerals needed to produce a wide range of electronic devices, as well as precious metals like silver and gold. However, wind turbine blades are not easy to recycle, because they are made from fiberglass, a difficult and expensive material to break down. Fortunately, recycling companies have found various ways to recycle about 85% of wind turbine blades, one of which is turning them into concrete and cement.

By breaking down the turbine blades, it is possible to recover materials and fibers useful for the production of concrete. One of them is silica, which can replace the sand and clay used to make cement. A study published in 2024 concluded that fibers from wind turbine blades could strengthen concrete. Likewise, cut blades can replace rebar, the steel rods used to improve durability.

Using wind turbine blades to make concrete and cement (which are different) is a great way to keep them from ending up in landfills. Although they last for decades, many blades are replaced sooner due to damage or technological advancements and end up in the trash due to high recycling costs. The number of obsolete turbine blades will increase in the coming years as existing wind farms age. A solution like this prevents pollution while eliminating one of the main CO emitters.₂ broadcasts are a big step forward.

Concrete is the most widely used material in the world, but its production is disastrous for the environment. It is responsible for around 7% of all CO₂ emitted globally, making it a major factor in why the building and construction sector accounts for more than a third of all emissions. Much of this comes from heating limestone to make cement, which releases carbon from both the fuel that ignites the kiln and the limestone itself.

The use of materials from the destruction of wind turbine blades can reduce, sometimes considerably, carbon production at different stages of the cement manufacturing process. In addition to replacing existing materials with new materials, parts of the blade can also replace coal as a fuel source in a furnace. This reduces CO from concrete production₂ emissions of around 27%. Using pieces of blades instead of rebar can reduce emissions from this step of the process by 90%.

The rapid growth of wind infrastructure means that eventually current equipment will need to be replaced. As a result, the question of what to do with decommissioned turbine blades will become more pressing. Increasing blade recycling capacity will allow concrete producers to reduce the material’s exorbitant carbon footprint, giving new life to these clean energy tools.