In the quest for sustainable construction materials, a team of researchers led by Iqra from the Centre for Advanced Manufacturing Technology at Western Sydney University has turned their attention to magnesium oxide (MgO)-based cementitious composites. Their work, published in the journal *Buildings* (which translates to *Zdania* in English), offers a fresh perspective on how these materials could reshape the future of green construction, particularly in the energy sector.
The construction industry is under immense pressure to reduce its carbon footprint, and traditional cement production is a significant contributor to greenhouse gas emissions. MgO-based composites have emerged as a promising alternative, offering both environmental benefits and enhanced structural integrity. However, their widespread adoption has been hindered by concerns over durability and resistance to harsh environmental conditions.
Iqra and her team delved into the influence of various supplementary cementitious materials (SCMs) such as fly ash, silica fume, and rice husk ash, as well as different types of fibers including polyethylene (PE), polypropylene (PP), polyvinyl alcohol (PVA), glass, sisal, and cellulose. Their goal was to understand how these additives affect the mechanical and durability properties of MgO-based composites.
The researchers assessed mechanical performance through compressive and tensile strength tests, while durability was evaluated based on porosity, permeability, water absorption, shrinkage, and carbonation resistance. Their findings highlight the potential of these composites to meet the demands of sustainable construction, but also identify key challenges that need to be addressed.
“Our review suggests that MgO-based composites can significantly reduce the environmental impact of the construction industry,” Iqra explained. “However, to fully realize their potential, we need to overcome issues related to long-term durability and resistance to environmental stressors.”
The implications for the energy sector are substantial. As the push for net-zero emissions intensifies, the demand for sustainable building materials is expected to grow. MgO-based composites could play a crucial role in constructing energy-efficient buildings and infrastructure, contributing to the broader goals of reducing carbon emissions and mitigating climate change.
Iqra’s research also points to future research directions that could further enhance the performance of MgO-based composites. By addressing these challenges, the construction industry can move closer to achieving its sustainability goals and paving the way for a greener future.
As the world grapples with the urgent need for sustainable development, innovations in construction materials like those explored by Iqra and her team offer a beacon of hope. Their work not only advances our understanding of MgO-based composites but also underscores the importance of continued research and innovation in the quest for a more sustainable built environment.