Aggregates

Overview

Aggregates are granular mineral materials — sand, gravel and crushed rock — used as the bulk constituent of concrete, mortar, asphalt and unbound road and drainage layers. They are the most heavily used construction material by volume and underpin almost every build.

They are grouped into fine aggregates (sands) and coarse aggregates (gravels and crushed stone), and into natural, recycled and manufactured sources, plus lightweight aggregates for lower-density concrete. Aggregates are specified by grading (particle size distribution), nominal maximum size, shape and surface, cleanliness (fines and clay content), and properties such as strength, resistance to crushing and abrasion, and freeze-thaw durability. Buyers include ready-mix and precast producers, contractors, asphalt plants and civil engineering projects.

On Digibition, quarries, aggregate producers and distributors publish verified profiles, so professional buyers can discover and compare them by specialization and country.

What to check when sourcing

When you source aggregates, start with the grading and size the application needs: fine or coarse, the nominal maximum size for the concrete or layer, and the cleanliness and shape that affect workability and strength. The same material can be unsuitable if the grading or fines content is wrong, so match it to the mix or specification rather than to a general description.

Aggregates are high-volume, low-value-per-tonne materials, so haulage distance and logistics often decide the delivered cost. Confirm whether supply is by tonne or by volume, loose or bagged, moisture content, and the delivery radius and vehicle access. Performance for construction uses is typically declared against recognised standards, and in the EU a Declaration of Performance may accompany a CE mark, so ask which standards, grading categories and documents apply in your market.

Use the directory to shortlist suppliers by specialization and country, then contact several, compare gradings, test data and delivered prices, and confirm minimum loads and lead times before you commit.

What to check when sourcing aggregates

Frequently asked questions

What are aggregates used for?

Aggregates are the bulk granular material in concrete, mortar and asphalt, and they form unbound layers in roads, foundations and drainage. They give these materials volume, strength and stability, which is why they are the most used construction material by volume.

What is the difference between fine and coarse aggregate?

Fine aggregate is sand, with small particles below a few millimetres, while coarse aggregate is gravel or crushed stone with larger particles. Concrete and mortar mixes use a controlled blend of both, chosen by grading to give the required workability and strength.

How do I find aggregate suppliers?

Use the Digibition directory to filter by this specialization and by country, then open each company profile to review its products, certifications and specializations. You can message suppliers directly, or add several to a quote list and request quotes from all of them at once.

Why does haulage distance matter so much?

Aggregates are heavy and low in value per tonne, so transport can be a large part of the delivered cost. A nearer source is often more economical than a cheaper material far away, which is why quarry location and vehicle access are worth confirming. This is general information, not legal or technical advice.

What should I check before placing a large order?

Confirm the aggregate type, grading, nominal size, cleanliness and durability properties, agree whether supply is by tonne or volume, delivery logistics, minimum load and lead time, and clarify which performance documents and test data your market needs before committing to volume.