Find the Best Aggregate Suppliers Near You

Aggregates are an assortment of rocks that usually consist of granular materials like gravel, sand and crushed stones. The aggregate provides the finished product with volume, stability, resistance to erosion and other desired physical properties. Aggregates are an important part of many domestic and commercial construction projects and applications.

In construction, aggregates are usually mixed with cement, bitumen, lime or another adhesive to create concrete or mortar. Aggregates are often used for septic drains, roadside drains and fountain drains. Construction aggregates can also be used as a base material for roads, railroads and foundations.

There are four main types of aggregates, including granite aggregates, limestone aggregates, gravel aggregates and secondary aggregates. See below for more information on each type:

Granite Aggregates Granite aggregate is second to none when it comes to the best aggregate supplies for high-grade concrete. Granite aggregate can also be used as a decorative feature as they are available in a variety of colours like red, pink and grey.

Limestone Aggregates Limestone aggregate is created through the breaking of sedimentary rock. It is mostly used in road construction and reinforced concrete, similar to granite and gravel aggregate.

Gravel Aggregates Gravel aggregate is made by sifting quarried rock and crushing natural stone. There are two types of gravel aggregate - gravel and stones. Gravel aggregate does not possess as much strength as granite aggregate, but it is often cheaper to purchase. It is used for foundations and concrete including reinforced concrete and road construction.

Secondary Aggregates Secondary aggregate is obtained by crushing construction waste like concrete, bricks and asphalt. It is designed as an effective, low cost option compared to other materials. Secondary aggregate is widely used for road construction, maintenance works, reinforcing weak soils and filling large scale concrete with its 5-20 MPa strength.

Around 130 million tonnes of aggregate is produced per year. The high-bulk, low value nature of aggregate explains that it is necessary to extract aggregate close to the market. Transportation cost also plays a vital role in determining the final cost of aggregate supplies.

For instance, an increase from 60 km (the average haulage distance) to 100 km can increase the cost from $17 per tonne to $23 per tonne.

iseekplant has a nationwide network of quality aggregate suppliers operating in all Australian capital cities from Brisbane to Sydney, Canberra, Melbourne to Darwin, Perth and Adelaide. We also offer aggregate solutions in all major towns and cities from Cairns down to the Gold Coast, Central Coast, Hobart and then across the country to Mandurah and Geraldton.

High-quality aggregate materials can be found across Australia through iseekplant. We connect you with reputable aggregate suppliers nationwide. The iseekplant platform simplifies finding and comparing suppliers, ensuring you can source the right type of aggregate for your specific project requirements.

Whether you're looking for crushed stone for a major infrastructure project or sand for landscaping, iseekplant offers access to a vast network of suppliers, equipped to provide top-quality materials that meet your specifications. To get a competitive quote for construction aggregates in your area, all you need to do is use iseekplant's get a quote tool. Alternatively, you can call us on 1300 691 912 or email us at projects@iseekplant.com.au.

Coarse aggregates are any aggregates more than 4.75mm in size per piece, including boulders, cobblestone and gravel. Fine aggregates are any aggregates less than 4.75mm in size per piece, including sand, silt and clay. Read our guide to see which ones are right for your project.

While the terms aggregate and gravel are often used interchangeably, they represent different concepts in the construction world. Aggregate refers to a broad category of coarse to medium-grained materials used in construction, including sand, gravel, crushed stone and recycled concrete.

On the other hand, gravel is a specific type of aggregate with a rounded shape, typically sourced from riverbeds or gravel pits. It’s one component of the broader category that aggregates encompass, indicating that while all gravel is aggregate, not all aggregate is gravel.

Aggregates can be sourced from natural deposits like riverbeds, gravel pits, quarries, and sand pits or from man-made sources such as recycled concrete. Natural aggregates are extracted through various methods, including dredging river beds, mining quarries or excavating gravel pits. Recycled aggregates are obtained by crushing concrete and asphalt from construction and demolition waste, making them an environmentally friendly option. These diverse sources ensure a steady supply of aggregates for various construction needs.

The most commonly used aggregates in construction and landscaping projects are crushed stone, sand, gravel and recycled concrete. Crushed stone is primarily utilised in concrete and asphalt mixtures and as a base material for roads. Sand is crucial for making concrete and mortar, offering a smooth consistency to the mixtures. Gravel finds its place in road construction and as drainage material, thanks to its permeability. Recycled concrete, gaining popularity for its environmental benefits, is often used as a base material or in creating new concrete.

The size of aggregate used in concrete depends on the type of project and structural requirements. Smaller aggregates (up to 10 mm) are ideal for thin slabs, decorative concrete, or detailed work, while medium (10–20 mm) and larger aggregates (20–40 mm) are suitable for general construction, footings, and structural elements. Correct aggregate sizing helps improve workability, strength, and durability of the concrete.

Tip: Always check project specifications, as structural designs often dictate maximum aggregate size to ensure proper concrete performance and finish.

Aggregate for concrete comes in various types and materials, each with distinct characteristics that affect strength, durability, and appearance. Common types include crushed rock, gravel, recycled concrete, and sand, and choosing the right type depends on your project requirements, budget, and desired finish.

Tip: Combining different aggregate types and sizes according to engineer or supplier specifications ensures concrete achieves the desired strength, durability, and finish.

The quantity of aggregate needed for a driveway depends on the driveway’s area, thickness, and type of aggregate. A typical residential driveway is usually 100–150 mm thick, and you can calculate the required volume using the formula:

Volume (m³) = Area (m²) × Depth (m)

Tip: Always order slightly more (around 5–10%) than calculated to account for compaction and spillage during installation.

Yes, many suppliers in Australia offer same-day delivery of aggregate, provided you place your order early and the product is in stock. Delivery availability depends on supplier location, order size, and site accessibility, so it’s best to confirm with the supplier before arranging urgent deliveries.

Tip: For urgent projects, contact multiple suppliers and confirm their same-day delivery policies to ensure your aggregate arrives when needed.