Sustainable Concrete Using Industrial Waste Material

The global construction industry accounts for approximately 8% of total CO2 emissions, with conventional Portland cement being the primary contributor. This article presents a comprehensive review of how industrial by-products — including fly ash, ground granulated blast-furnace slag (GGBS), silica fume, rice husk ash, and recycled aggregates — can effectively replace conventional concrete constituents. We examine the mechanical properties, durability, workability, and environmental performance of waste-incorporated concretes. Our findings demonstrate that strategic use of industrial waste materials can reduce CO2 emissions by 20 to 60 percent, lower production costs by 10 to 30 percent, and simultaneously improve long-term structural performance. The paper also addresses challenges in standardization, quality control, and large-scale adoption across developing and developed economies.