In the bustling world of construction, where the demand for sustainable materials is skyrocketing, a groundbreaking study by Gali Kusumanjali, a Post Graduate Student at the School of Infrastructure, Indian Institute of Technology Bhubaneswar, has shed new light on an innovative solution. The research, published in “Case Studies in Construction Materials”, explores the potential of bauxite residue (BR) as a viable replacement for natural sand in concrete, addressing both environmental and commercial challenges in the industry.
Imagine a scenario where a by-product of the aluminum industry, typically discarded as waste, could be transformed into a valuable component for structural concrete. This is precisely what Kusumanjali’s research aims to achieve. By investigating the feasibility of using BR as a partial replacement for fine aggregates, the study opens avenues for more sustainable construction practices.
The research unfolds in two phases. The first phase focuses on determining the optimal replacement content of BR as a partial substitute for natural sand. The second phase delves into the mechanical and long-term performance of concrete mixes containing 20% BR, known as BRC20 concrete. The findings are nothing short of remarkable. BRC20 concretes exhibited a strength 1.2 times higher than the control concrete mix. This enhanced strength is attributed to the development of a dense microstructure and increased particle packing, as Kusumanjali explains, “The substitution of BR as fine aggregates in concrete is a viable option for structural concrete as all the test results fall within the prescribed limits outlined by the various codes of practice.”
The implications of this research are far-reaching. Not only does it provide a sustainable solution for disposing of bauxite residue, but it also offers a cost-effective alternative to natural sand, which is becoming increasingly scarce. This could significantly impact the energy sector, where construction activities are rampant. The use of BRC20 concrete in structural members for residential buildings, self-compacting concrete, and the production of concrete blocks and pavers for non-structural uses could revolutionize the way we approach construction materials.
The study’s findings suggest that BRC20 concretes could be used in mainstream construction activities, including the construction of structural members for residential buildings. The applications extend to self-compacting concrete, where red mud acts as a viscosity-modifying agent, and in the production of concrete blocks and pavers for non-structural uses. These applications not only address environmental concerns associated with red mud disposal but also promote the development of innovative and eco-friendly construction materials.
As the construction industry continues to evolve, the integration of bauxite residue into concrete mixes could become a game-changer. The research by Gali Kusumanjali, published in “Case Studies in Construction Materials”, paves the way for a more sustainable future. By leveraging this innovative approach, the industry can reduce its reliance on finite natural resources while minimizing waste, ultimately shaping a greener and more efficient construction landscape.