Valorization and reuse of construction and demolition waste for its transformation into ecological bricks

Abstract

This research assesses the viability of utilizing construction and demolition waste (CDW) for the production of environmentally-friendly bricks. The methodology employed in this study consists of three main components: An analytical and evaluative investigation of CDW, the selection of appropriate waste materials, and the determination of suitable proportions. The experimental groups were prepared using a volumetric approach, namely Type A (1:6), Type B (1:7), and Type C (1:8), by incorporating CDW, cement, coarse sand, fine sand, crushed stone, confitillo, and polystyrene for the relevant tests. The findings indicate that the optimal composition is achieved with a ratio of 1:5:2 of cement to coarse sand (with 1 part of recycled expanded polystyrene aggregate) and fine sand (with 2 parts of fine sand aggregate) while maintaining a water-to-cement ratio of 1:1. This composition complies with the standards outlined in NTP 399.602:2017, NTP 399.604:2002, and NTP 400.037:2018. In conclusion, the utilization of CDW presents a promising alternative for the construction industry, and effective management practices will facilitate the promotion of a sustainable culture within the sector.