An Essential Overview: Building Aggregates and Their Different Type

As a crucial material in construction, aggregates serve as a foundational building block in multiple types of projects. This article aims to introduce the different types of aggregates, focusing particularly on river sand, building sand, plaster sand, and gravel, and their applications in the construction industry.

What are building aggregates?

Aggregates are granular materials used in construction, including sand, gravel, crushed stone, and recycled concrete. They are typically categorized into two types - fine and coarse. The fine type includes sand, while gravel and crushed stone belong to the coarse category. A crucial characteristic of aggregates is their ability to distribute weight and provide stability, contributing to the durability of the structure.

What are the different types of building aggregates?

River Sand

River sand, a type of fine aggregate, is naturally sourced from river beds. Known for its smooth, round granules, it offers excellent workability, making it ideal for concrete production. The rounded granules lead to reduced friction which in turn minimizes wear and tear of the concrete mix. Despite its benefits, river sand extraction poses certain ecological concerns, leading to an increased emphasis on sustainable alternatives.

Building Sand

Also referred to as pit sand, building sand is another type of fine aggregate. It's typically orange or red due to the presence of iron oxide and is rougher than river sand. Building sand is typically used for bricklaying, where its coarser texture allows for greater adhesion with cement. This sand type is also prevalent in the creation of mortar for the laying of bricks.

Plaster Sand

Plaster sand, finer than building sand, is widely used in plastering applications. Its smooth texture, coupled with the ability to hold moisture, enables an easy and smooth application of plaster. Moreover, it creates a compact, uniform, and crack-free layer, which improves the aesthetics and life of the plastered surface.

Gravel

Gravel, a coarse aggregate, is comprised of small stones of varying sizes. Known for its durability and longevity, gravel is primarily used in concrete mixes and for creating firm, stable surfaces when compacted. It is often applied in the construction of roads, driveways, and walkways. Furthermore, in drainage systems, gravel aids in preventing water accumulation and flooding.

Aggregates, including river sand, building sand, plaster sand, and gravel, are fundamental to construction practices. Understanding their unique properties and applications can guide the selection process for different building projects. It is, however, equally important to source these materials responsibly, considering the environmental impact of aggregate extraction and use. Always look for sustainable or recycled options where possible to contribute to the preservation of our natural resources.