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 St. Astier Research & Development Dept:
CO2 contents after each burning to regulate slaking, Tensile strength, Elasticity moduli, Adhesion, Workability (flow table), Whiteness.

For further Guidance, contact your St Astier Distributor.
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