Ladrillos de concreto con agregado grueso reciclado y limadura de hierro

Abstract

This monograph analyzes the production and evaluation of concrete bricks made from coarse recycled aggregate (RCA) sourced from construction and demolition waste, combined with iron filings, in order to assess their structural viability and environmental sustainability. Several mixtures with varying percentages of iron filings were designed and tested, following an experimental methodology aligned with national (NTC) and international (ASTM) standards, supported by previous research on alternative concrete materials. The samples were tested for physical and mechanical properties, including compressive strength, water absorption, and apparent density. Results showed that using RCA alone significantly reduced the material's strength, whereas the progressive addition of iron filings considerably improved its performance. A maximum compressive strength of 32.03 MPa was achieved with 7.5% iron filings, surpassing conventional concrete brick standards. This study demonstrates the technical and environmental feasibility of producing masonry units by reusing solid waste, reducing the ecological footprint of construction practices, and supporting the Sustainable Development Goals.