EU Norms (EN 459) Mandatory testing program
for Natural Hydraulic Limes
| POWDERS | |||||
|---|---|---|---|---|---|
|
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 | |||||
|---|---|---|---|---|---|
|
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 |
Other tests regularly performed by the Saint-Astier® Research & Development Dept: CO2 contents after each burning to regulate slaking, tensile strength, elasticity moduli, adhesion, workability (flow table), whiteness.