Washing & Classifying

Washing and classifying is the process of removing silts, fines, clays, slimes, crusher dust, stains, coatings and other deleterious materials from sand and aggregate products to meet construction specifications.

Why Washing & Classifying

Aggregate products, such as sand and gravel, are mined from the earth or dredged from lakes and rivers. These raw materials often contain contaminants such as clays, silts, slimes, stains, coatings, crusher dust and fine material that can be harmful to the end-use product in terms of structural integrity and visual appearance. When used in construction, aggregates must meet various specifications, with standards for each type of product regarding particle size and shape, soundness and durability, specific gravity, the amount of deleterious substances present and more.

The washing process removes these impurities, while the classifying process separates the particles to meet required size specifications.

Benefits of Washing & Classifying

The biggest benefit of washing and classifying is creating a clean, in-spec product. Washing and classifying removes lightweight materials and undesirable particles from the feed to ensure a consistent, high-quality product that meets required specifications for various construction projects. This allows the end product to be strong and durable.

Washing and classifying can be accomplished with a variety of different equipment types and in various configurations.