Influence of Waste Glass Powder as a Partial Replacement of Cement in Concrete

Abstract

As the global construction industry increasingly relies on concrete for infrastructure, the significant carbon footprint of traditional cement production—responsible for approximately 7% of greenhouse gas emissions—presents a critical environmental challenge. To mitigate global warming and address the growing crisis of industrial solid waste management, there is a vital shift toward integrating recycled industrial by-products as alternative binders. Utilizing these waste materials not only diverts them from landfills but also offers a more energy-efficient and economical substitute for virgin resources. This research explores the viability of such sustainable binders to enhance the ecological profile of concrete without compromising its structural versatility. By repurposing industrial waste within the vast scope of global construction, the industry can achieve a circular economy while reducing its overall environmental impact.

Introduction

Concrete is widely used in construction but contributes significantly to CO? emissions due to its dependence on Ordinary Portland Cement (OPC). To promote sustainability, this study explores the use of waste glass powder as a partial replacement for cement. Glass powder, rich in silica, acts as a pozzolanic material that enhances the formation of Calcium Silicate Hydrate (C-S-H), improving strength, reducing permeability, and minimizing risks like Alkali-Silica Reaction (ASR). It also helps reduce waste, lower costs, and decrease environmental impact.

The study aims to evaluate the strength and performance of concrete with varying percentages of glass powder replacement. Previous research shows optimal strength improvements typically between 10% and 20% replacement, with finer glass particles (<90 microns) being more effective.

The methodology involves preparing concrete mixes with different glass powder proportions (0–30%), testing material properties, casting specimens, and curing them for 7, 14, and 28 days. Standard materials like OPC (grade 43), aggregates, sand, and water are used, and tests are conducted following standard guidelines.

Conclusion

The experimental investigation into the partial replacement of cement with industrial waste glass powder (WGP) reveals that a 20% substitution level serves as the optimal threshold for enhancing mechanical performance. This improvement is primarily attributed to the dual action of the pozzolanic reaction and the micro-filler effect, where the fine glass particles effectively occupy interstitial voids to create a denser concrete microstructure. While the high silica and alumina content of the glass powder significantly strengthens the paste-to-aggregate bond and reduces overall permeability, a dilution effect is observed when replacement exceeds 25%, resulting in a subsequent decline in compressive strength. Beyond structural benefits, utilizing finely ground WGP helps mitigate the risks of the Alkali-Silica Reaction (ASR) and offers a transformative environmental solution by reducing industrial waste accumulation and lowering the carbon emissions associated with traditional cement manufacturing. To expand upon these findings, future studies should transition toward a multi-parameter analysis that explores the interaction of glass powder with various cement types and varying water-cement ratios. Research could be widened to evaluate hybrid replacement strategies where both cement and fine aggregates are substituted with glass-derived materials, or to investigate the mechanical synergy created by introducing glass fibers into the matrix for improved tensile capacity. Furthermore, there is a significant need for advanced microstructural characterization to precisely quantify the chemical transitions within the interfacial transition zone. Finally, assessing the bond strength between glass-integrated concrete and steel reinforcement will be essential in determining the feasibility of this sustainable material for large-scale reinforced concrete applications and specialized structural engineering projects.

References

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Copyright

Copyright © 2026 Miss. Tejasvini N. Kshirsagar, Prof. Raju Bondre, Prof. Fanindra Katre. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.