Use of Recycled Aggregate Concrete in Building Construction

Abstract

Use of recycled aggregate in concrete can be useful for environmental protection. Recycled aggregates are the materials for the future. The application of recycled aggregate has been started in a large number of construction projects of many European, American, Russian and Asian countries. Many countries are giving infrastructural laws relaxation for increasing the use of recycled aggregate. This paper reports the basic properties of recycled fine aggregate and recycled coarse aggregate & also compares these properties with natural aggregates. Basic changes in all aggregate properties are determined and their effects on concreting work are discussed at length. Similarly the properties of recycled aggregate concrete are also determined. Basic concrete properties like compressive strength, flexural strength, workability etc. are explained here for different combinations of recycled aggregate with natural aggregate. Codal guidelines of recycled aggregates concrete in various countries are stated here with their effects, on concreting work. In general, present status of recycled aggregate in India along with its future need and its successful utilization are discussed here.

Introduction

The text discusses the rapid growth of urbanization and construction in India due to industrialization, which has led to a high demand for construction materials and increased generation of construction and demolition waste. Concrete is widely used because of its durability and low maintenance, but this results in frequent demolition of old structures and large-scale waste production.

India generates millions of tons of construction and demolition waste annually, most of which is not effectively recycled, leading to environmental problems such as land degradation and loss of soil fertility. However, this waste contains useful materials like concrete, ceramics, wood, metal, and plastics that can be recycled. Recycling construction materials, especially recycled concrete aggregates (RCA), can significantly reduce environmental impact, carbon emissions, and overall project costs.

The text highlights that recycled aggregates may slightly reduce concrete strength and increase water absorption and shrinkage, but they are still suitable for partial replacement of natural aggregates. Benefits of recycling include cost savings, reduced use of natural resources, lower carbon emissions, and faster material availability. However, challenges include reduced quality, higher water demand, and additional processing requirements.

The study aims to evaluate the feasibility of using recycled aggregates in construction, compare them with natural aggregates, and identify cost-saving and environmental benefits. It also outlines methods for collecting, crushing, and testing recycled materials according to standards.

International case studies from countries like Scotland, Denmark, the Netherlands, USA, Japan, Singapore, Hong Kong, and India show increasing adoption of recycling practices in construction waste management to promote sustainability and reduce landfill use.

Conclusion

1) Use of recycled aggregate up to 30% does not affect the functional requirements of the structure as per the findings of the test results. 2) Various tests conducted on recycled aggregates and results compared with natural aggregates are satisfactory as per IS 2386. 3) Due to use of recycled aggregate in construction, energy & cost of transportation of natural resources & excavation is significantly saved. This in turn directly reduces the impact of waste material on environment.

References

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Copyright

Copyright © 2026 Vikash Singh Tomar, Tinkal Dhakad, Shashank Gupta. 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.