REVIEW PAPER: PARTIAL REPLACEMENT OF CONVENTIONAL AGGREGATES IN CONCRETE

Abstract

The increasing demand for sustainable construction practices has driven research into alternative materials for concrete production. One area of significant interest is the partial replacement of conventional aggregates (course and fine) with alternative materials such as recycled aggregates, industrial by-products, and natural alternatives. This paper reviews the current state of research on the partial replacement of conventional aggregates in concrete, focusing on materials such as recycled concrete aggregate (RCA), fly ash, silica fume, slag, and other natural aggregates. The paper evaluates the mechanical properties, durability, environmental impact, and economic feasibility of using these alternatives in concrete. Additionally, diagrams are provided to illustrate the process of aggregate replacement and its impact on the concrete microstructure. Keywords: Concrete, recycled aggregate, fly ash, silica fume, slag, sustainability, mechanical properties, durability, and eco-friendly materials.