Simple Integration of Recycled Cement Sack Fibres into Pervious Concrete for Engineering Applications

Lachira J.; Herrera L.; Ruiz G.; Castañeda D.; Varhen C.; Guerrero R. · International Conference on Civil, Structural and Transportation Engineering (2025) · DOI: 10.11159/iccste25.306

Resumen

This study proposes a straightforward methodology for incorporating cellulose fibres (CF) from recycled cement sacks into pervious concrete. The process involves converting the sacks into pulp and preparing the material to achieve the minimum saturation conditions required for integration into the concrete mix. As part of the research, CF was evaluated in the cementitious matrix at three dosages (3.86, 5.79, and 7.73 kg/m3) to assess their effects on rheological behaviour. It was validated in the production and testing of pervious concrete. A simple and accessible mechanical procedure was developed to produce the CF, requiring a minimum pre-saturation period of 12 hours to ensure adequate mix flow ability and sufficient paste thickness within the matrix. Saturated CF inclusion improved permeability by up to 33% without compromising mechanical performance, acting as internal curing agents, enhancing long-term compressive strength at selected dosages. CF enhanced matrix–aggregate bonding, improved post-crack integrity, reduced brittleness, and promoted a more ductile failure mode. This approach supports sustainable construction practices by valorising cement packaging waste and offers a practical solution that could be adapted for industrial application, depending on local technological and economic conditions.

Instituciones: Universidad de Piura