Facts about aggregates

Aggregates are inert granular materials such as sand, gravel, or crushed stone that, along with water and Portland-cement, are essential ingredients in concrete.

For a good concrete mix design, aggregates need to be clean, hard, strong particles free of absorbed chemicals or coatings of clay and other fine materials that could cause the deterioration of concrete.

Aggregates strongly influence concrete's freshly mixed, hardened properties and physical characteristics of ready products.

Consequently, selection of aggregates is important process.