Published by Build Hub Company Limited · Updated
Crusher dust in simple terms
Crusher dust is the fine material left as rock is crushed. Its angular particles allow it to spread, screed and compact into a close layer, which is why it is commonly used around paving and for selected levelling or blinding work.
It may also be described as aggregate bypass, although names and grading can vary between sources. Buyers should identify the application rather than relying on a trade name alone.
Common uses on a Zanzibar site
- A controlled bedding layer beneath interlocking pavers where the paving detail permits it
- Joint filling for paving when the supplied grading is suitable
- Levelling and blinding over coarser sub-base material
- Selected compacted fill where drainage is not the primary requirement
Where crusher dust is the wrong material
Crusher dust contains fines and tends to hold water, so it is not the same as clean drainage aggregate. It is also not an automatic substitute for plaster sand, mortar sand or concrete sand, and should not replace a designed hardcore layer simply because it compacts smoothly.
Follow the project detail for layer build-up, compaction and drainage. If the specification is unclear, send the relevant drawing or describe the finished work with the quote request.
How to estimate and receive it
- Measure the finished area and confirm the required compacted depth
- Allow for compaction and site loss when converting the finished layer to an order volume
- Prepare a clean, firm tipping area close to the work
- Keep crusher dust separate from sand and coarse aggregate stockpiles
- Tell the supplier about narrow roads, soft approaches or restricted truck turning space
Ordering crusher dust from Build Hub
Send the area, layer depth, intended use, site location and required date. Build Hub's current indicative material rate is TZS 40,000 per m³; quantity, availability, location and delivery access are confirmed in the written quotation.
For paving, request the crusher dust with hardcore or aggregate sub-base and pavers so the quantities and delivery sequence can be coordinated.