Saint Astier®

Natural Hydraulic Lime

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Home / Technical Info / Quality Control & Testing Program

Quality Control & Testing Program

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.

About TransMineral

TransMineral, USA was established in 1997 by Michel Couvreux, an architect in France and the U.S. His familiarity with traditional “old world” building techniques and materials have been instrumental in their revitalization in the U.S. along with his stewardship of implanting Saint Astier® Natural Hydraulic Lime in the North American building sector.

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