In a groundbreaking study, researchers have unveiled an innovative method for producing geopolymer-based artificial angular coarse aggregate, a development that could significantly reshape construction practices. Led by Atul S. Kurzekar, a research scholar from the Department of Civil Engineering at Yeshwantrao Chavan College of Engineering in Nagpur, India, this research introduces a cut-blade mechanism that enhances the traditional aggregate manufacturing process.
The study highlights the use of a modified concrete drum mixer, fitted with additional cutting blades, to create angular aggregates with a uniform particle size range of 10 mm to 20 mm. This method not only improves the consistency of aggregate shapes but also boosts mechanical interlocking properties, which are crucial for the structural integrity of concrete. “Our approach ensures a more uniform aggregate shape, which is vital for enhancing the performance of concrete in construction applications,” Kurzekar stated.
The experimental results are promising, showcasing abrasion values between 13.2% and 31.5%, impact values from 9.8% to 21.6%, and water absorption rates ranging from 2.62% to 4.2%. Specific gravity values were also recorded between 1.18 and 2.2. These metrics suggest that the aggregates produced through this method not only meet but may exceed the performance of conventional aggregates.
A significant aspect of this research is the optimization of the alkali activator dosage using advanced statistical methods. By employing ANOVA tests and Response Surface Methodology (RSM), the team achieved high predictive accuracy, with R² values exceeding 0.93. This mathematical model correlates well with experimental results for critical properties such as specific gravity and water absorption, indicating a robust framework for future aggregate production.
Microstructural analysis further supports the findings, with Scanning Electron Microscopy (SEM) revealing optimal pore distribution within the aggregates. Additionally, X-ray Fluorescence analysis identified key materials such as Quartz, Ettringite, and calcium silicate hydrate gel, which contribute to the strength and durability of the aggregates.
The implications of this research extend beyond mere technical advancements. By utilizing waste materials in aggregate production, this approach not only promotes sustainability but also addresses environmental concerns associated with traditional construction methods. “This research not only demonstrates the technical feasibility of producing high-performance artificial aggregate from waste materials but also underscores its potential to mitigate environmental impacts,” Kurzekar emphasized.
As the construction industry grapples with sustainability challenges, the adoption of geopolymer-based aggregates could pave the way for greener building practices. With the potential to reduce reliance on natural resources and lower carbon footprints, this innovation stands to influence future developments in the field significantly.
The findings of this research were published in “Case Studies in Construction Materials,” a journal dedicated to advancements in construction technology and materials science. For more information, you can explore Kurzekar’s work through his affiliation at Yeshwantrao Chavan College of Engineering.