A university professor has called for the integration of agricultural waste into Nigeria’s building and construction industry, describing it as a practical solution to improving infrastructure sustainability, reducing environmental pollution, and lowering construction costs.
The appeal was made by Professor Samson Olalekan Odeyemi, a Structural and Materials Engineering expert at Kwara State University (KWASU), during the institution’s 22nd inaugural lecture. Speaking on the theme, “From Rubble to Resilience: Gathering the Fragments for a New Structural Paradigm,” Odeyemi urged policymakers, engineers, and industry stakeholders to embrace agricultural residues as valuable construction resources rather than treating them as waste.
According to the professor, agricultural by-products such as rice husks, guinea corn husks, bamboo leaves, and other crop residues possess significant engineering potential when processed into supplementary construction materials. He explained that extensive research has shown that concrete produced with agricultural waste-derived materials can achieve, and in some cases exceed, conventional engineering standards while offering a more environmentally friendly alternative to traditional cement-based products.
Odeyemi noted that adopting these innovative materials could reduce Nigeria’s dependence on imported construction inputs, cut carbon emissions associated with cement production, and stimulate local industries involved in processing agricultural residues. He emphasized that converting farm waste into construction materials would also create additional income opportunities for farmers and rural communities while addressing waste disposal challenges.
To demonstrate the practical application of the research, the professor pointed to interlocking paving stones installed at the entrance of the KWASU Faculty of Engineering. The paving stones were produced using rice husk ash and locally sourced fibres, showcasing that agricultural waste-based construction materials have already moved beyond laboratory experiments into real-world infrastructure projects.
He further stressed the need for stronger regulation within Nigeria’s construction industry to curb the use of substandard materials that contribute to building failures. Odeyemi called on the Standards Organisation of Nigeria (SON) and other regulatory agencies to ensure that only certified construction materials are approved for use across the country.
The engineering scholar also recommended that agro-based pozzolans and other sustainable materials be incorporated into Nigeria’s National Building Code to encourage wider adoption by engineers, architects, and contractors. Such policy support, he argued, would strengthen the country’s transition toward resilient, affordable, and environmentally responsible infrastructure development.
Experts have increasingly identified agricultural waste as a promising resource for sustainable construction, with studies showing that processed crop residues can improve concrete durability, enhance thermal insulation, and reduce the environmental footprint of building projects. As Nigeria continues to seek innovative solutions for housing and infrastructure challenges, the integration of agricultural waste into construction could play a significant role in advancing sustainable development while promoting a circular economy.
Source: Guardian news
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