In a significant stride towards sustainable construction practices, a groundbreaking study led by Leopold Mbereyaho from the University of Rwanda, College of Science and Technology, has unveiled the potential of basalt powder waste as an affordable concrete admixture. This research addresses two pressing issues: the rising costs of construction materials in Rwanda and the environmental impact of unused basalt powder, which is often left to accumulate at various sites across the country.
As the construction industry grapples with fluctuating material prices, many of which are imported, Mbereyaho’s findings present a viable alternative. “By utilizing locally sourced basalt powder, we can not only cut costs but also reduce environmental pollution,” he stated, emphasizing the dual benefits of this innovative approach. The study, published in the Journal of Building Materials and Structures, reveals that incorporating basalt powder into concrete can significantly accelerate the setting time—by more than 13 times—while offering a cost-effective solution for the construction sector.
The research examined various percentages of basalt powder waste—ranging from 0% to 20%—and assessed their impact on concrete properties such as workability and compressive strength. While the introduction of basalt powder enhanced the setting speed, it did lead to a reduction in compressive strength by approximately 24.5% compared to traditional concrete. This trade-off raises interesting questions about the balance between efficiency and strength in concrete applications.
Mbereyaho’s study illustrates that the construction industry in Rwanda could leverage this abundant resource to create a more sustainable and economically viable building practice. “Our findings suggest that with careful formulation, basalt powder can be a game-changer for local contractors and builders,” he added, hinting at the potential for widespread adoption of this material in future projects.
The implications of this research extend beyond Rwanda. As global construction practices increasingly prioritize sustainability, the utilization of industrial waste materials like basalt powder could inspire similar innovations worldwide. The construction sector, often criticized for its environmental footprint, may find in basalt powder a pathway to greener practices without sacrificing affordability.
As the industry moves forward, the findings from Mbereyaho’s research could serve as a catalyst for change, prompting further investigations into alternative admixtures and paving the way for a new era of environmentally responsible construction. The study not only highlights the potential for cost savings but also reinforces the importance of local resources in building a sustainable future.
For those interested in exploring the full study, it can be found in the Journal of Building Materials and Structures, which translates to the Journal of Building Materials and Structures in English. More information about the lead author can be accessed through the University of Rwanda’s website at lead_author_affiliation.