EU Norms (EN 459)Mandatory testing program for Natural Hydraulic Limes
POWDERS |
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|---|---|---|---|---|---|
| TEST | NORM | EN459 Values | St Astier Values | Frequency | St.Astier Frequency |
| Fineness | EN196-6 | residue by mass 0.09mm/0.2mm <15%/<5% |
5-7% | daily | daily |
| Free water | EN459-2 | NHL2/3.5<2 | <2 | ||
| NHL5<1 | <1 | monthly | monthly | ||
| Soundness (Expansion) |
EN459-2 | <2 | <1 | once a day | several times per day |
| Bulk density Kg/dm3 |
EN459-2 | NHL20.4-0.8 | 0.56 | monthly | each product batch |
| NHL3.50.5-0.9 | 0.61/0.65 | ||||
| NHL50.6-1.0 | 0.66/0.75 | ||||
MORTARS (prepared with standard EU sand/ISO 679 @ 1:1 vol. ratio |
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|---|---|---|---|---|---|
| Penetration | EN459-2 | >20mm | >20mm | monthly | weekly |
| <50mm | <50mm | ||||
| Setting time | EN459-2 | >1h/<15h | >3h/<10h | 2 per week | 2 per week |
| Air content | EN459-2 | <20 | <20 | monthly | monthly |
| Compressive | EN459-2 | 28 days | weekly | continuously | |
| Srength | N/mm2 | ||||
| NHL2 | 2 to 7 | 2 to 3 | |||
| NHL3.5 | 3.5 to 10 | 3.5 to 6 | |||
| NHL5 | 5 to 15 | 5 to 9 | |||
| SO3 | EN196-2 | ||||
| content % | 3* | 0.45/0.65 | monthly | continuously | |
| *up to 7% admissible if soundness is demonstrated at 28 days of water curing | |||||
| Available | EN459-2 | NHL53% | 15-20% | weekly | each product batch |
| Lime | minimum | NHL3.59% | 22-26% | each product batch |
|
| values | NHL215% | 50-55% | each product batch |
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Other tests regularly performed by the St. Astier Research & Development Dept:
CO2 contents after each burning to regulate slaking, Tensile strength, Elasticity moduli, Adhesion, Workability (flow table), Whiteness.