In the quest for sustainable construction materials, a team of researchers led by Sourabh Dhiman from the Department of Civil Engineering at Chandigarh University, India, has made a significant stride. Their study, published in the journal “AIP Advances” (which translates to “Advances in Physical Sciences”), explores the potential of micro-silica (MS) and ceramic tile waste (CT) to enhance the mechanical and durability properties of M40 grade concrete. This research could have profound implications for the construction and energy sectors, particularly in reducing waste and lowering carbon footprints.
The construction industry is under increasing pressure to adopt sustainable practices. Dhiman and his team aimed to address this by investigating the effects of partially replacing cement and coarse aggregates with MS and CT. “We wanted to find a balance between sustainability and structural integrity,” Dhiman explains. “The idea was to use industrial by-products and demolition waste to create a more eco-friendly concrete mix without compromising on performance.”
The team prepared eighteen different concrete mixes, varying the proportions of MS (0%–12.5%) and CT (0%–50%). They evaluated these mixes for compressive, split tensile, and flexural strength at 7, 28, and 90 days, along with water absorption and microstructural analyses. The results were promising. The mix labeled MS7.5CT30, which contained 7.5% micro-silica and 30% ceramic tile waste, showed a 1.73% increase in compressive strength, a 3.26% increase in split tensile strength, and a 3.21% increase in flexural strength at 28 days. Additionally, water absorption was reduced to 3%, indicating improved matrix density and lower permeability.
To ensure the reliability of their findings, the researchers employed statistical optimization using the Taguchi L9 orthogonal array and regression modeling. The regression models demonstrated strong predictability, with R2 values of 0.894 for tensile strength and 0.970 for flexural strength. ANOVA results highlighted ceramic tile waste as the dominant factor influencing strength, followed by micro-silica.
The study also included a multi-criteria evaluation through the TOPSIS method, which ranked MS7.5CT30 as the optimal and most sustainable mix. SEM micrographs confirmed a dense, homogeneous microstructure with minimal porosity, further validating the team’s findings.
So, what does this mean for the future of construction and the energy sector? The integration of industrial and demolition wastes into concrete production could significantly reduce the environmental impact of construction projects. “This research provides a framework for utilizing waste materials in a way that not only benefits the environment but also enhances the performance of concrete,” Dhiman notes.
The potential commercial impacts are substantial. By reducing the need for virgin materials, construction companies could lower their costs and carbon footprints. The energy sector, which often involves large-scale construction projects, could also benefit from these sustainable practices. As the demand for green buildings and infrastructure continues to grow, innovations like this could become a cornerstone of the industry.
In conclusion, Dhiman’s research offers a compelling case for the use of micro-silica and ceramic tile waste in concrete production. It’s a step towards a more sustainable future, one that could reshape the construction and energy sectors for the better. As the industry continues to evolve, such innovations will be crucial in meeting the challenges of sustainability and performance.