In a groundbreaking study, researchers have explored the potential of basic oxygen furnace slag (BOFS) as a sustainable construction material, revealing promising applications that could significantly impact the energy sector. Conducted by Omarova Zhaniya from the Department of Civil & Environmental Engineering at Nazarbayev University, this research delves into mineral sequestration technology, a method that may enhance the performance of concrete while addressing environmental challenges associated with carbon emissions.
BOFS, a byproduct of steel manufacturing, is abundant and has garnered attention for its ability to capture carbon dioxide. However, its integration into construction materials has been hindered by concerns over material stability due to the presence of unstable compounds that can cause deterioration over time. As Zhaniya explains, “Our research identifies a viable pathway to not only utilize BOFS effectively but also to enhance its durability through mineral sequestration, thereby addressing a critical issue in concrete performance.”
The study investigates the properties of mortar mixes containing BOFS subjected to mineral sequestration over an extended period. One of the key findings indicates that specific aging conditions, particularly stockpiling and wet/dry cycles, significantly optimize the carbonation process, achieving a CO2 uptake of 4.15-5.15%. This level of carbonation is crucial as it correlates directly with the stabilization of aggregates, potentially leading to stronger and more durable concrete formulations.
The implications of this research extend beyond material science; they resonate deeply within the energy sector. By enhancing the carbon capture potential of BOFS, this technology could contribute to reducing the carbon footprint of construction projects, aligning with global sustainability goals. As industries increasingly seek eco-friendly practices, the demand for materials that not only perform well but also help mitigate climate change is on the rise.
Zhaniya’s work is particularly timely, given the ongoing challenges faced by the construction industry in meeting regulatory standards for emissions and sustainability. “If we can demonstrate that BOFS can be effectively used in concrete while capturing CO2, we open doors to a new paradigm in sustainable construction,” she asserts, highlighting the dual benefits of improved material performance and environmental stewardship.
The findings are documented in the publication ‘E3S Web of Conferences’, which translates to ‘Environmental, Energy, and Sustainability Sciences Web of Conferences.’ As the industry looks to innovate and reduce its environmental impact, the insights from this research may pave the way for future developments in construction materials that are both economically viable and environmentally responsible.
For more information about this research and its implications, visit Nazarbayev University.
