Aerolite's scoria aggregates weigh about half that of comparable dense aggregates without sacrificing quality. Weighing in between 750 to 850 kgs per M3.

That means on average you will only need to purchase half the amount of scoria when compared to a dense weight aggregate to complete the same job. Saving you money on product cost, time and transport. Not to mention helping the environment in more ways than one!

Which colour?

Aerolite's scoria comes in 2 basic natural colors - red and black. Due to natural variations in our source rock on site, natural colors can vary from deep red to brown or true black to charcoal to grey as over time when different parts of the hill are quarried.

To overcome this problem for customers who require consistency in colour, Aerolite has developed a environmentally friendly proprietary product that remains consistent in colour over time. These two products are known as volcanic red and Volcanic black. We stock in 14 mm aggregates but can be produced in other sizes on request.

Please view our Volcanic Mulch range for more info

There are 3 main types of natural scoria aggregates:

  • Drainage aggregates which are usually a red to brown colour and are generally used as construction materials where colour is unimportant. These are produced in 7, 7-10, 10, 14, 20 mm nominal sizes. We also produce a 40mm aggregate for use in filter applications
  • Natural black aggregates whose major use is in the production of light weight concrete. These are produced in 7, 10, 14 and 20 mm nominal sizes. Natural black aggregates are usually black to charcoal to grey in colour.
    We also produce a BBQ rock product which has a nominal 40mm size. This material has the advantage over other aggregates that it can be heated to high temperatures without dangerous spitting.
  • Washed Aggregates are ideal to use in conditions that naturally occurring fines, found in scoria, is a concern. These produces can be used in applications such as to fill in underground water storage, as filter material in water treatment and as a pre-soaked concrete aggregate. These products are produced as a 3-5mm grit, 7, 14 and 20mm aggregates.


Grading and density sheets for various scoria aggregates are shown below:

Check out our grading and density sheets for our different scoria aggregates:

3-5mm washed grit

7 mm aggregate

10 mm aggregate

14 mm aggregate

20 mm aggregate