Textile Waste Transforms into Sustainable Fuel and Stronger Concrete, Lithuanian Researchers Find
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A groundbreaking initiative at Kaunas University of Technology (KTU) is demonstrating the potential of textile waste to revolutionize both the energy and construction sectors, offering a pathway toward a more circular economy and reduced environmental impact. Researchers are successfully converting discarded fabrics into alternative fuels and high-performance materials for cement and concrete production.
According to a spokesperson for KTU’s Faculty of Chemical Technology, the cement industry is a significant contributor to pollution, particularly through the clinker firing process. “This is why researchers are actively seeking ways to reduce the amount of conventional cement in cement-based mixtures by replacing it with alternative binders or fillers,” they stated.
Boosting Concrete Strength with Recycled Polyester
Early results from the ongoing research are particularly promising. Incorporating just 1.5% of recycled polyester fibers – recovered from used garments – can increase concrete strength by 15–20% and dramatically improve its resistance to freeze-thaw cycles, the university announced. This enhancement suggests a viable method for creating more durable and sustainable infrastructure.
From Textile Ash to Cement Substitute
The team is also investigating the potential of “textile ash,” a byproduct of thermal treatment of textile waste at 300°C in an oxygen-free environment. This process yields carbon-rich granules with high calorific value, positioning them as potential alternative fuels. While the combustion of these granules produces ash, KTU’s findings reveal that this ash can substitute up to 7.5% of conventional cement, boosting compressive strength by as much as 16% under standard curing conditions.
“This innovation offers a dual environmental advantage,” a senior researcher noted. “It reduces CO2 emissions from cement manufacturing and provides a novel solution for managing textile waste.”
EU Circular Economy Goals Drive Innovation
The research is being conducted as part of the “Production of Alternative Fuel from Textile Waste in Energy-Intensive Industries (Textifuel)” project, a collaboration between KTU and the Lithuanian Energy Institute. The timing is crucial, as the European Union (EU) is actively updating its waste management rules to prioritize a sustainable circular economy, with a particular focus on high-impact sectors like textiles and construction.
Despite the immense scale of the waste challenge – with several billion tonnes generated annually across the EU – only a small fraction of post-consumer textiles are currently collected for separate processing, and advanced fiber-to-fiber recycling technologies remain underdeveloped.
While the production of alternative fuels from textiles is still in its early stages both in Lithuania and globally, interest in the field is rapidly growing. This research represents a significant step toward realizing the full potential of textile waste as a valuable resource, contributing to a more sustainable future.
