Converting Tonnes and Cubic Metres: Bulk Density and Sand Bulking
The weight and volume of materials change with compaction and moisture. Learn bulk density, the bulking of damp sand and how to estimate sand and gravel quantities.
Sand and gravel industry
Ordering Aggregate: What Should You Tell Your Supplier?
An exact order prevents rejected loads and site stoppages. A practical list of what a sand and gravel inquiry needs, from application to delivery.
Many supply problems start before loading, in an order that just says “sand” or “gravel”. The more exact the information, the faster availability can be checked and the less chance of a mismatch.
What to include
- Application: structural concrete, mortar, a road layer or drainage
- Material type: natural or crushed, washed or unwashed
- Grading: the size range or class number, such as size 57 in ASTM C33
- Technical reference: a standard or the project specification
- Quantity: approximate volume or weight, and the amount per stage
- Delivery: address, truck access limits and the site schedule
Why state the application first
A sand that is excellent for mortar may not suit concrete, and vice versa. Stating the application helps the right option be suggested. These differences are explained in Classifying sand and gravel.
Samples and approval
For sensitive uses, ask for a sample and test it before the main order. Record the approved material as the baseline so later shipments can be compared with it.
Recording delivery terms
Decide the weighbridge ticket, the site stockpiling method and who accepts delivery in advance. A separate stockpile on a clean surface prevents contamination. The contract unit must also be clear; Converting tonnes and cubic metres helps with this.
Sending an inquiry
You can send this information through the inquiry form. The follow-up route is on the supply chain page.
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