In a significant advancement for sustainable construction practices, researchers from Covenant University in Nigeria have explored the potential of using agro-waste materials—specifically periwinkle and palm kernel shells—as substitutes for traditional granite in interlocking concrete pavers. This study, led by Oluwarotimi Olofinnade from the Department of Civil Engineering, highlights the urgent need for the construction industry to pivot towards eco-friendly practices in the face of rising raw material costs and environmental concerns.
As urbanization continues to escalate, the demand for concrete aggregates has surged, prompting a search for alternative materials that not only reduce resource depletion but also mitigate environmental pollution. The research, published in ‘Frontiers in Built Environment,’ demonstrates that discarded periwinkle shells (PWKS) and palm kernel shells (PMKS) can be effectively utilized in low-replacement volumes—up to 5%—to create load-bearing paver units suitable for medium-duty traffic roads.
Olofinnade states, “Our findings reveal that while the incorporation of these agro-wastes results in a gradual decrease in compressive strength as their proportions increase, they still allow for the production of pavers that meet the required strength of 30 MPa when adequately cured.” This highlights a pivotal balance between sustainability and performance, as the study shows that pavers cured through complete immersion in water achieved better strength compared to those cured in open air.
The implications of this research extend beyond mere academic interest. By utilizing agricultural by-products, the construction sector can significantly lower its reliance on conventional materials, thereby decreasing costs and promoting a circular economy. The study’s results suggest that construction companies could adopt these eco-friendly pavers not only to enhance their sustainability profiles but also to respond to increasing regulatory pressures regarding environmental impact.
Furthermore, the research underscores the importance of proper curing techniques, which can enhance the performance of pavers made with these alternative materials. This insight could lead to new industry standards and practices, influencing how construction projects are planned and executed, particularly in regions where access to traditional materials is limited.
Olofinnade’s work represents a promising shift towards resource conservation in the built environment, demonstrating that innovation in material science can lead to practical solutions for pressing environmental challenges. As the construction industry grapples with the dual pressures of rising costs and sustainability mandates, this research serves as a beacon of hope, showcasing the potential of agro-waste management in paving the way for a greener future.
For more information on this groundbreaking study, readers can refer to the Department of Civil Engineering at Covenant University [here](http://www.covenantuniversity.edu.ng).