In a groundbreaking study, researchers have unveiled a new type of green photocatalytic mortar that utilizes nano-TiO₂-treated recycled concrete aggregates, offering a promising solution for tackling air pollution in urban environments. This innovative approach not only addresses environmental concerns but also highlights the potential for sustainable practices in the construction industry.
The research, led by Xue-Fei Chen from the School of Civil Engineering at Putian University and the Department of Architecture and Civil Engineering at City University of Hong Kong, demonstrates the effectiveness of utilizing recycled aggregates (RA) in producing high-performance mortar. The study revealed that the porous surface structure of the old mortar layer in the RA significantly enhances the specific surface area available for the loading of nano-TiO₂, a key component responsible for the mortar’s photocatalytic properties.
Chen emphasized the significance of this development, stating, “By establishing a stable Ti-O-Si chemical bond through a hydroxylation treatment process, we ensure that the green photocatalytic mortar maintains its durability and efficiency during both production and application.” The mortar exhibited an exceptional NOx removal efficiency of approximately 90.75%, showcasing its potential to mitigate harmful nitrogen oxides in urban air.
The implications of this research extend beyond environmental benefits. The integration of recycled materials into construction not only reduces waste but also lowers the carbon footprint of building projects. As cities grapple with increasing pollution, the demand for innovative solutions like this mortar is likely to rise. Chen notes, “This advancement represents a significant step toward sustainable construction practices, paving the way for future developments in green building materials.”
To further enhance the mortar’s performance across various operational scenarios, the researchers developed a predictive model using a Back Propagation Neural Network. This model integrates both experimental and theoretical data, providing insights that can optimize mortar use in diverse applications.
As urban areas continue to expand and face environmental challenges, the commercial implications of this research are profound. The construction sector can leverage these findings to adopt more sustainable methods, potentially leading to increased market demand for eco-friendly building materials. This shift not only aligns with global sustainability goals but also positions companies at the forefront of innovation in the built environment.
Published in ‘Developments in the Built Environment,’ this research marks a significant milestone in the utilization of recycled materials in construction, contributing to a cleaner, greener future. For more information, you can explore the lead author’s work at lead_author_affiliation.
