Crusher dust is a very versatile material that can be used for lots of different construction jobs.
We’ve put together this guide to help you navigate the world of crusher dust and learn more about it so that you can make an informed decision.
What is crusher dust?
Crusher dust is a grey powder, made of finely crushed rock.
It’s also known as quarry dust, rock dust, stone dust or cracker dust.
Crusher Dust can be used for various compacting and stabilising purposes, such as driveways, walkways, and patios.
What is crusher dust used for?
Crusher dust has a wide range of uses including:
- As a base and subbase material for construction
- Under the foundations of patios and paths to improve drainage
- As a base for artificial grass
- Under concrete pavers
- Around driveways
- Under concrete slabs
- In retaining walls
- Shed bases
- Fill for fence posts
- Mixed with concrete
- Around water tanks
How to lay crusher dust
- Use a rake to spread the crusher dust evenly over the area
- Wet the crusher dust to stop it from blowing away and improve compacting
- Use a vibrating plate compactor to compact the crusher dust
- Consider using a smooth drum roller for further compacting
Is crusher dust compactable?
Yes, crusher dust is compactable.
You can use a plate compactor to help make it more solid (and you can get a serious workout in the process).
Be sure to wear proper protective clothing because it gets seriously dusty when it’s not wet.
What is crusher dust made from?
Crusher dust is a fine material produced from the compaction of crushed rock. It is usually a byproduct.
Crusher dust has many uses around the home and for construction.
It can be used in place of sand if you are trying to make your own concrete mix at home. It’s also sometimes referred to as rock dust or finely crushed stone screenings.
Is crusher dust good for driveways?
Yes, crusher dust is a great material for driveway construction.
Crusher dust creates an easy base for laying concrete slabs and driveways or creating pathways.
Is crusher dust good for under pavers?
Crusher dust is ideal for levelling out areas before you install new pavers, slabs or stones.
However, sometimes crusher dust will be too fine to be used as the sole layer under pavers, as described in the video below:
Is crusher dust good for drainage?
Using crusher dust as a solution for drainage is becoming an increasingly popular option, with many benefits.
There are many reasons to use crusher dust in your driveway or yard.
For example, it can be used for drainage, to fill the potholes in gravel driveways and to create walkways.
Crusher dust is also used for backfilling trenches to help water flow smoothly through the draining system.
Another advantage of using crusher dust on your project is that it will help you save money in the long run.
The material costs much less than gravel and can be easily shaped by hand as well as by machine.
If you have artificial grass on your property, then you know that you need a good drainage system so that rainwater does not pool on top of your lawn and create a muddy mess – crusher dust is perfect for this.
Can you mix crusher dust and cement?
You can mix cement and crusher dust. It is often used instead of sand.
However, keep in mind that crusher dust, or stone dust, changes the make-up of your concrete, which may lead to it being less workable or compromise its strength.
Where to buy crusher dust in Australia
You can easily find crusher dust for sale in your local hardware store.
However, if you want to buy it in bulk volumes at an affordable price, it is best to order it online directly from a manufacturer.
Does Bunnings sell crusher dust?
Yes, Bunnings sells crusher dust.
At the time of writing, products in stock include:
- Bastion Aggregate Crusher Dust
- Ki Carma Road Base
- Mother Earth Concrete Sand
- Brunnings Landscape Paver Sand
How much does crusher dust cost?
Crusher dust typically costs between $40 and $90 per cubic metre.
When selecting the right supplier for your crusher dust requirements, be sure to factor in delivery charges if you aren’t located close by.
If possible, request quotes from different suppliers so you can find out exactly how much you can expect to pay.
Is crusher dust the same as cracker dust?
Cracker dust and crusher dust are the same things. There are a few colloquial terms for this type of product, including blue metal dust, cracker dust, quarry sand and some others.
Despite the different names, it’s all the same thing: crusher dust.
Crusher dust vs road base
There are two kinds of base commonly used for pavers, driveways, and paths: road base and crusher dust.
- Road base is a mixture of bitumen, sand, decomposed granite, crushed gravel or limestone.
- Crusher dust is made up of rock. It is often leftover from concrete recycling.
When choosing between the two, road base contains a wider range of sizes so will compact better than crusher dust or sand.
However, road base is generally more expensive than crusher dust.
Crusher dust vs sand
Both sand and crusher dust make an excellent base for patio pavers.
The issue with crusher dust is it can vary from batch to batch, so you risk getting stone dust that is too fine, and it may not remain compact while you lay pavers.
Crusher dust that is too fine can also lead to issues with drainage.
Do you wet crusher dust before compacting?
Wetting the crusher dust before you compact it will stop it from blowing away and allow you to more effectively compact it.
Crusher dust for your garden
You may have heard that adding crusher dust on top of your soil can help it retain moisture better during dry periods – this is because the particles trap water inside their structure and stop it from evaporating into the air.
This helps keep plants alive even when they aren’t getting enough water naturally through rainstorms or irrigation systems.
This saves on watering requirements as well as provides healthy conditions for your plants without using chemical fertilisers which might harm sensitive plants.