Stone products cause more ordering confusion than sand, mostly because the vocabulary is loose. "Hardcore" means one thing to a groundworker and another on a delivery note; "crusher run" and "batu campur" get used for several different gradings. The result is loads that are technically what was ordered and wrong for the job.
This guide sorts out the terms and matches them to the work.
The short version
- Foundations and raising levels — dumping hardcore. Bulk, coarse, laid and compacted.
- Road formation and paving driveways — chipping stone, or a crusher-run blend.
- Concrete — aggregate, which is a graded product, not general hardcore.
Dumping hardcore
The coarse, bulk product. It is used in construction and laid mainly as the foundation of a building, or as formation material to raise levels, fill irregularities and create a firm level working base onto which heavy load-bearing surfaces such as stone or concrete can be laid. The hardcore then helps spread imposed loads evenly.
The point of dumping hardcore is bulk and load spreading, not appearance or fine tolerance. Specifying a cleaner, finer stone for this work costs more and performs no better. What matters is that it compacts properly and that the layer is thick enough for the load above — a question for your engineer, not your supplier.
Chipping stone
Finer and smaller in size, chipping stone hardcore is widely used in construction and mainly for the formation of roads and paving driveways. Where dumping hardcore is about bulk, chipping stone is about a tighter, more workable layer that finishes closer to level.
For driveways and light hardstanding, chipping stone over a compacted base is the usual build-up. For road formation the layer specification governs — and if your works are to a public-authority specification, follow the spec rather than this guide.
Crusher run
Crusher run — batu campur — is not a separate material so much as a description: crushed stone supplied as a mixed grading with the fines left in, rather than screened to a single size. Those fines are the point. They fill the voids between larger pieces, so the material locks up and compacts far better than single-sized stone.
That makes it the standard choice for sub-base and hardstanding where you want a dense, stable layer. It is a poor choice where you want free drainage, because the same fines that give it stability also slow water through it.
Aggregate for concrete is a different question
"Aggregate" in a concrete context means material graded to a specification, with controlled sizing and cleanliness. General hardcore is not that, and substituting it into a structural mix is not a saving. If you need aggregate for concrete, specify the grading you need and the volume, and say it is for concrete when you enquire.
Terms at a glance
- Dumping hardcore — coarse bulk stone. Foundations, raising levels, load spreading.
- Chipping stone — finer, cleaner. Road formation, paving, driveways.
- Crusher run / batu campur — mixed grading with fines. Sub-base, hardstanding, compacted layers.
Full product detail is on the Hardcore Stone page. Other materials: sand, clay and tin.
Other guides
Describe the layer, not just the stone
Tell us what the material is going under and how deep. If the product you asked for is wrong for that build-up, we would rather say so first.