José Lachira, Leydi Herrera, Gaby Ruiz, David Castañeda, Christian Varhen, Rosalba Guerrero
Abstract: This study proposes and validates a methodology for incorporating cellulose fibres (CF) from recycled cement sacks into pervious concrete. The process involves mechanically converting the sacks into pulp and pre-saturating them to ensure integration into the mix. The CF obtained was evaluated in terms of composition, and its performance was assessed through rheology and the mechanical and permeability properties of pervious concrete at three dosages (3.9, 5.8, and 7.7 kg/m³). A straightforward mechanical procedure was established to produce the CF, requiring a minimum pre-saturation period of 12 hours to secure adequate mix flowability and paste coating uniformity. XRF and XRD tests confirmed that the treatment reduced cement residues, although traces of chlorine remained. Saturated CF did not compromise matrix fluidity, ensuring an adequate coating. Additionally, CF improved permeability by up to 32.9% without compromising strength, acting as an internal curing agent and enhancing long-term compressive strength up to 10.4%. CF also strengthened matrix–aggregate bonding, improved post-crack integrity, and promoted a more ductile failure mode. In conclusion, processing cement sacks into cellulose fibres provides a practical and sustainable solution for improving cohesion and permeability in pervious concrete while maintaining mechanical performance. This approach supports sustainable construction by valorising packaging waste and offers a method adaptable to industry, depending on local conditions.
Keywords: This study proposes and validates a methodology for incorporating cellulose fibres (CF) from recycled cement sacks into pervious concrete. The process involves mechanically converting the sacks into pulp and pre-saturating them to ensure integration into the mix. The CF obtained was evaluated in terms of composition, and its performance was assessed through rheology and the mechanical and permeability properties of pervious concrete at three dosages (3.9, 5.8, and 7.7 kg/m³). A straightforward mechanical procedure was established to produce the CF, requiring a minimum pre-saturation period of 12 hours to secure adequate mix flowability and paste coating uniformity. XRF and XRD tests confirmed that the treatment reduced cement residues, although traces of chlorine remained. Saturated CF did not compromise matrix fluidity, ensuring an adequate coating. Additionally, CF improved permeability by up to 32.9% without compromising strength, acting as an internal curing agent and enhancing long-term compressive strength up to 10.4%. CF also strengthened matrix–aggregate bonding, improved post-crack integrity, and promoted a more ductile failure mode. In conclusion, processing cement sacks into cellulose fibres provides a practical and sustainable solution for improving cohesion and permeability in pervious concrete while maintaining mechanical performance. This approach supports sustainable construction by valorising packaging waste and offers a method adaptable to industry, depending on local conditions.
Date Published: September 25, 2025 DOI: 10.11159/ijci.2025.010
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