Utilization of Construction and Demolition Waste in Eco-Friendly Non-Bearing Bricks: A Study on Latex–Cement Synergistic Binders

Document Type : Original Article

Authors

Mining and Geological Engineering Department, Cairo University

Abstract

Recycling construction and demolition waste (CDW) offers a valuable application toward reducing environmental impact and promoting sustainable construction practices. This study examines the synergistic combination of styrene–butadiene rubber (SBR) latex and Ordinary Portland Cement (OPC) as chemical modifiers for improving the mechanical and physical performance of reclaimed CDW-based non-bearing bricks made and produced with ambient curing conditions. Untreated CDW displayed very low compressive strength (<0.1 MPa) and excessive porosity. 30% cement achieved a compressive strength of 5.95 MPa, which meets Egyptian standards for load-bearing walls. 30% SBR produced moderate strength (0.74 MPa) and dramatically reduced water absorption. 10% cement – 10% SBR demonstrated a synergistic effect of compressive strength of 3.6 MPa, achieving the requirement of non-bearing bricks which can be used in partitions and many other applications. Water absorption of 9.3%. Durability tests, including immersion and wet–dry cycling, provided strong evidence of improved structural resistance. Microstructural studies showed increased inclusiveness of particles and matrix densification attributed to C–S–H formation and latex film encapsulation. These results suggest that low-energy, ambient-cured, and chemically modified CDW composites have potential as sustainable alternatives to bricks that comply with the circular economy, sustainable development goals, and apply according to Egyptian standards of bearing and non-bearing bricks

Keywords

Main Subjects

Files

History

  • Receive Date: 23 July 2025
  • Revise Date: 12 August 2025
  • Accept Date: 24 August 2025

Share

How to cite

Statistics