Title:
Effect of Cement Replacement by Bauxite Residue on Mechanical Properties of Concrete
Author(s):
Yassine Brahami, Mathieu Fiset, Ali Saeidi, Kadiata Ba, and Rama Vara Prasad Chavali
Publication:
Materials Journal
Volume:
122
Issue:
1
Appears on pages(s):
19-30
Keywords:
bauxite residue; cement; mechanical properties
DOI:
10.14359/51744374
Date:
1/1/2025
Abstract:
Concrete, a highly energy-intensive material, contributes approximately 10% of global carbion dioxide (CO2) emissions. To address this issue, incorporating industrial residues in concrete production has emerged as a viable solution, reducing natural resource consumption and lowering the CO2 footprint. Using bauxite residues in concrete has proven to be an environmentally friendly and sustainable approach. In this study, cement mass was partially replaced with bauxite residues (at 5%, 10%, 15%, and 20%), with variations in residue diameter (300 μm, 600 μm, and 2 mm) and in liquid form. The concrete’s workability, air content, density,
mechanical strength, elasticity, Poisson’s ratio, and porosity were
assessed with each replacement percentage. The study revealed
that bauxite residues can effectively replace up to 20% of cement
in a concrete mixture. Although their use slightly affects the fresh
properties of concrete, it significantly enhances its mechanical
properties. With this approach, a sustainable and eco-friendly
concrete without compromising its performance can be created.