Analysis of Hardened Concrete by Using Chemical Treatment on Recycled Aggregate

Abstract

Recycled Aggregate Concrete (RAC) is an eco-friendly and sustainable construction material in which recycled concrete aggregate (RCA) is used as a partial or full replacement for natural aggregates. This project focuses on the production, properties, and environmental benefits of RAC, developed by crushing, processing, and reusing construction and demolition waste such as concrete, sand, gravel, and slag. The increasing demand for construction materials has led to excessive consumption of natural resources and generation of large quantities of waste, creating significant environmental challenges. RAC offers a viable solution by promoting the reuse of waste materials, thereby supporting the principles of the circular economy.

The study highlights how RAC contributes to reducing landfill burden, conserving natural aggregates, and lowering energy consumption and pollution associated with traditional concrete production. In addition, RAC proves to be cost-effective compared to conventional concrete due to reduced material costs and waste management expenses. The project also examines the performance characteristics of RAC, including strength, durability, and workability, to evaluate its suitability for various construction applications.

Furthermore, the use of industrial waste as admixtures enhances both environmental sustainability and economic feasibility. With rapid urbanization and infrastructure development, especially in developing countries, the management of demolition waste has become a major concern. RAC emerges as a practical and sustainable alternative that minimizes environmental impact while maintaining acceptable structural performance. Overall, this project emphasizes the importance of adopting RAC in modern construction practices to achieve resource efficiency, waste reduction, and long-term environmental protection.