In a groundbreaking development that could revolutionize the construction industry, researchers have successfully created high-strength geopolymer mortar using construction and demolition waste (CDW). This eco-friendly innovation, led by Osama Youssf from the Structural Engineering Department at Mansoura University in Egypt, promises to significantly reduce the environmental footprint of construction projects, particularly in the energy sector.
Geopolymer mortar, an alternative to traditional Portland cement, is known for its durability and strength. However, the availability of its primary components—fly ash and slag—has become increasingly limited due to the surge in geopolymer construction. This is where Youssf’s research comes into play. By utilizing brick waste (BW), ceramic tile waste (CTW), roof tile waste (RTW), and glass waste (GW) from CDW, the team has developed a sustainable solution that not only addresses waste management issues but also enhances the mechanical and durability properties of geopolymer mortar.
The study, published in the journal Infrastructures, involved replacing traditional geopolymer mortar binders and sand with CDW at rates of 25% and 50% by volume. The results were impressive. The compressive strength of the high-strength geopolymer mortar (HSGM) ranged from 24 to 104 MPa, with the highest strengths achieved through specific curing conditions. “The use of CDW in HSGM helps reduce the depletion of natural resources and minimizes waste accumulation, enhancing environmental sustainability,” Youssf explained. This finding is particularly relevant for the energy sector, where large-scale construction projects often generate substantial amounts of waste.
One of the key advantages of this new mortar is its resistance to environmental stressors. The HSGM mixes demonstrated excellent resistance to freezing/thawing cycles and sulfate attacks, making them ideal for harsh environments. Additionally, the water absorption and sorptivity of the mortar varied depending on the type of CDW used, with brick waste and glass waste showing the most promising results.
The commercial implications of this research are vast. By utilizing locally sourced CDW, construction companies can significantly reduce transportation costs and landfill fees. Moreover, the production of geopolymer mortar consumes less energy than traditional cement manufacturing, leading to long-term cost savings. “The use of CDW in HSGM enhances sustainability by reducing natural resource consumption and landfill waste,” Youssf noted. This aligns perfectly with the growing demand for sustainable and cost-effective construction materials in the energy sector.
The potential for this technology to shape future developments in the construction industry is immense. As the demand for eco-friendly and durable materials continues to grow, the adoption of HSGM could become a standard practice. This would not only reduce the environmental impact of construction projects but also promote a circular economy, where waste is repurposed into valuable resources.
The research by Youssf and his team opens up new avenues for innovation in the construction industry. By leveraging CDW, we can create more sustainable and resilient infrastructure, paving the way for a greener future. As the industry continues to evolve, the integration of such eco-friendly technologies will be crucial in meeting the challenges of climate change and resource depletion. The findings, published in Infrastructures, provide a solid foundation for further research and development in this exciting field.
