Title:
Effect of Cement Replacement by Bauxite Residue on the Mechanical Properties of Concrete (Prepublished)
Author(s):
Yassine Brahami, Mathieu Fiset, Ali Saeidi, Kadiata Ba and Rama Vara Prasad Chavali
Publication:
Materials Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
bauxite residue; cement; concrete; mechanical properties
DOI:
10.14359/51744374
Date:
11/22/2024
Abstract:
Concrete, a highly energy-intensive material, contributes around 10% of global 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 the concrete mix. Although their use slightly affects the fresh properties of concrete, it significantly enhances its mechanical properties. With this approach, sustainable and eco-friendly concrete without compromising its performance can be created.