HS 2530.90Industrial minerals
Natural Pozzolan
- Spec
- ASTM C618 Class N
- Packing
- Bulk vessel · Big bags
- Use
- Blended cement, concrete
High-purity quartz sand with controlled grain size and low iron content.
Silica sand is a high-purity quartz sand with controlled grain size and low iron content.
Purity and grading decide the use: glass production needs low iron, foundries need a defined grain fineness.
| Parameter | Unit | Limit / requirement | HPG typical | Test method |
|---|---|---|---|---|
| SiO2 | % | grade-specific | [tbc] | XRF |
| Fe2O3 | % | grade-specific | [tbc] | XRF |
| Al2O3 | % | grade-specific | [tbc] | XRF |
| AFS grain fineness number | — | grade-specific | [tbc] | AFS method |
| Moisture | % | grade-specific | [tbc] | Gravimetric |
| Clay content | % | grade-specific | [tbc] | AFS method |
Summary for orientation only. The latest edition of the referenced standard and the specification agreed in the SPA govern.
Every cargo is sampled and tested by an independent inspection company (SGS, Intertek or equivalent) at the port of loading. The buyer receives the following documents: