Physical & Mechanical Data

St Astier Natural Hydraulic Limes (NHL)

  NHL 5 NHL 3.5 NHL 2
Combined Silica bands 12-16 8-12 4-8
Available lime % 15-20 (>3) 20-25 (>9) 50-60 (>15)
Density (gr/litre) 650/750 (600-1,000) 600/660 (500-900) 450/520 (400-600)
Surface cover (cm2 per gram) 8,000 9,000 11,000
Granulometry:
Residue @ 0.09mm
7% 6.5% 5%
Whiteness Index (Y) 67 72 76
Compressive strength* *5-9 (5-15) *3.5- 8 (3.5-10) *2-5 (2-7)
Flexural strength N/mm2* 2.30 2 1
Soundness ( max. 2mm)** <1mm <1mm <1mm
Set, beginning (1-15 h) *** 3-4 5-6 8-10

FIGURES IN BRACKETS AND ITALICS REFER TO THE INCOMING EU 459-1 NORMS

* N/mm2 @ 28days. Measured in accordance with EU Norm EN 459 on EU Std. Mortars @ 1:1.3 mix ratio. Values vary depending on dosages and sands used.
** Expansion (soundness) measured according to EN459-2/5.3.2.2 and French Norm NFP15-311, not using Le Chatellier Test which allows expansion value up to 20mm.
*** On mortars. Not on lime paste.

 
Tests on common mortar mixes
Binder : Sand Ratio 1 : 2 1 : 2.5 1 : 3
  NHL5 NHL3.5 NHL2 NHL 5 NHL3.5 NHL2 NHL5 NHL3.5 NHL2
Set (beginning) hours 3 5 8 3 6 9 3 6 9
Elasticity Moduli
28 days N/mm
10800 9010 9025 11000 9000 9800 10000 8970 9000
6 months 18000 16250 12600 17050 13505 12030 16900 12450 11800
12 months 18510 15280 12515 17280 13620 12030 16150 13150 11900
24 months 21500 17480 13375 18020 13785 12000 17430 13670 11750
Compressive strength  
7 days N/mm2 1.96 0.75 0.62 1 0.57 0.53 0.88 0.53 0.47
28 days 2.2 1.88 1.48 2 1.47 1.36 1.5 1.34 1.25
6 months 7.31 7.1 3.84 5.91 5.34 3 5.32 3.94 2.88
12 months 9.28 7.5 4 8.44 5.9 2.9 6.5 3.9 2.9
24 months 10.81 8.63 4.25 8.81 6.00 3.00 7.8 3.97 2.75
 
Permeability (vapour exchange)
Gr. of air x m2 x hour x mmHG
0.55 0.62 0.68
0.6
0.64
0.7
0.69
0.70 0.71
Shrinkage mm.m 0.17 0.59 0.75 0.13 0.44 0.60 0.15 0.25 0.51
Capillarity g.min 0.88 1.18 3.05 2.54 4.7 7.84 4.61 6.3 8.7
Small Logo

For further Guidance, contact your St Astier Distributor.
Copyright © 2016 CESA, Chaux et Enduits de St Astier