Recent research led by Zhang Guo from the School of Water Conservancy and Transportation at Zhengzhou University has unveiled significant advancements in the development of geopolymer mortar, a sustainable construction material poised to revolutionize the industry. This study, published in ‘Nanotechnology Reviews’, highlights the incorporation of polyvinyl alcohol (PVA) fibers and nano-silica (nano-SiO2) to enhance the rheological properties of geopolymer mortar, making it a compelling option for the repair and strengthening of existing structures.
Geopolymer mortar is gaining traction due to its environmentally friendly nature, utilizing recycled materials such as fly ash and slag powder. As construction practices increasingly prioritize sustainability, the findings from this study may have far-reaching implications. “The integration of PVA fibers and nano-SiO2 not only improves the material’s performance but also aligns with the industry’s shift towards more sustainable practices,” Guo stated.
The research focused on three key rheological parameters: dynamic yield stress, static yield stress, and plastic viscosity. The results revealed a nuanced relationship between the content of nano-SiO2 and the rheological properties of the mortar. Notably, as the nano-SiO2 content increased from 0 to 2.5%, the dynamic yield stress, static yield stress, and plastic viscosity exhibited increases of 22.6%, 12.4%, and 22.9%, respectively. This suggests that a precise balance of nano-SiO2 can optimize the performance of geopolymer mortar, enhancing its workability and durability.
Furthermore, the study demonstrated that the addition of PVA fibers significantly influenced the rheological parameters. With a fiber content of just 1.2%, the dynamic yield stress surged by 65%, static yield stress by 56%, and plastic viscosity by an astonishing 161%. Guo emphasized the potential of these findings, stating, “By optimizing the fiber content, we can create a geopolymer mortar that not only meets but exceeds the performance standards required for modern construction.”
As the construction sector grapples with the dual challenges of sustainability and performance, the insights from this research could pave the way for more resilient and eco-friendly building materials. The ability to enhance the properties of geopolymer mortar through the strategic use of additives like PVA fibers and nano-SiO2 aligns with industry trends focused on innovation and sustainability.
For construction professionals, this research not only represents a step forward in material science but also offers a commercially viable solution to enhance the longevity and effectiveness of repairs in existing structures. As the industry continues to evolve, the implications of Guo’s findings may very well shape the future of sustainable construction practices.
For more information about Zhang Guo and his work, you can visit his affiliation at School of Water Conservancy and Transportation, Zhengzhou University.