Feasibility Analysis of Rubber as Crushed Sand and Fly Ash as Cement

Abstract

Currently, the disposal of waste tyre is becoming a major waste management problem worldwide. It is estimated that Approximately 1.4 billion tons of waste tire rubber produced globally per year. The present study aims to investigate the optimal use of waste tyre rubber crumbs as a substitute for crushed sand in concrete composites. This study determines the compressive strength performance of rubber concrete and the disposal of waste tyres.Concrete is a mixture of cement, aggregate, water, and admixtures. In concrete, fly is used as a cementitious material. A comparative study is carried out, and the use of fly ash as a cement replacement in concrete can be analyzed and compared.The feasibility analysis aims to assess the practicality and viability of using rubber as crushed sand and fly ash as cement in concrete. Using rubber as crushedsandandflyashascementin concrete has shown promise in several studies. Additionally, incorporating fly ash as a cement replacement in concretemixtures has been found to improve compressive strength.

Introduction

Disposing of vehicle tyres in landfills creates significant environmental, health, and economic issues, while the continuous use of natural aggregates in construction depletes natural resources. This study explores using recycled tyre rubber as a partial replacement for crushed sand and fly ash as a partial replacement for cement in concrete, addressing both waste management and resource conservation.

The concrete mix designed is M20 grade, with 15% of crushed sand replaced by finely ground tyre rubber and 10% of cement replaced by fly ash. Materials used include ordinary Portland cement, rubber powder from recycled tyres, fly ash, crushed sand, coarse aggregates, and potable water with a water-cement ratio of about 0.55–0.60.

Tests performed include the slump cone test to measure workability and compressive strength tests at 7, 14, and 28 days curing to evaluate strength. Results showed that concrete containing rubber as sand and fly ash as cement maintained acceptable workability (slump value ~35 mm) and exhibited comparable or slightly improved compressive strength compared to conventional concrete.

The study concludes that incorporating tyre rubber and fly ash in concrete is a promising sustainable alternative that can improve concrete performance while reducing environmental impact.

Conclusion

The feasibility analysis of using rubber assandandflyashascementinconcrete has provided valuable insights into the potential benefits and challenges associated with these alternative materials. 1) This is found that there are positive result and decreases in the properties of M-20 grade of concrete due to the used ofrubber as crushed sand and fly ash as cement. 2) Whenrubber wasused instead of crushedsandinconcreteitshows less compressive strength when compared with ordinaryconcrete. 3) The compressive strength of concrete mixes decrease with increase in fly ash. The fly ash can be replaced up to 10%-15% for better result. 4) As a recommendation for future work, a proper study on small range percentages of the rubber between 3%-6.5% could be performed. The curing time should also be extended to 90 days. 5) replacing cement with fly ash in concrete offers a sustainable and benefits in terms of environmental,cost- effectiveness. 6) Thismix proportion,shouldused onlyinsmallconstructionproject And for plastering work.

References

[1] ACI Committee 232. (2012). Fly Ash in Concrete. American Concrete Institute. [2] Abdollahzadeh, A., Masoudnia, R., &Aghababaei, S. (Year). Predicting the strength of rubberized concrete using artificial neural networks. Cement and Concrete Research, 34, 2309–2372. Elsevier. [3] Journal of Materials in Civil Engineering. (2007, September 1). Influence of fly ash as cement replacement on the properties of recycled aggregate concrete. ASCE. [4] Bureau of Indian Standards. (2009). IS 10262: Guidelines for Concrete Mix Design Proportioning. New Delhi: BIS. [5] Padhye, R. D., &Deo, N. S. (2016, January 8–9). Cement replacement by fly ash in concrete. Proceedings of the National Conference on Advances in Engineering & Technology, Walchand College of Engineering, Sangli&Sinhgad Institute of Technology and Science, Pune. [6] Alam, I., Mahmood, U. A., &Khattak, N. (2015, April). Use of rubber as aggregate in concrete: A review. Department of Civil Engineering, University of Engineering and Technology, Peshawar, Pakistan. [7] The Journal of Cleaner Production. (2013, November 15). Effect of partial replacement of sand by recycled fine crumb rubber on the performance of hybrid rubberized-normal concrete under impact load: Experiment and simulation.

Copyright

Copyright © 2025 Suhas Sawant, Sandip Bolegave, Piyush Vasudev, Sanjivani Patil, Sanjeevani Shinde, Mangesh Jadhav. 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.