Natural Lime NHL 5 (Chaux 100 naturelle Pure) Product Data
St Astier Natural Hydraulic Limes (NHL)

Conforms to European Norms EN 459 and BS 459
Strength factor: 5 (Eminently hydraulic)
Residue @ 0.09 mm: 7%
Density (volumetric weight) typical: 700 gr. / litre
Available (free) lime Ca(OH)2 after slaking: 20-22%
Shelf life: 8-12 months kept sealed and dry
Contains no additives.
Whiteness index: 67
Surface cover (cm2per gram): 8000
Expansion : < 1mm
Residue of quick lime after slaking: < 1%
Packing: 30kg. Bags
MORTARS Compressive strengthN/mm2 Elasticity Moduli (Mpa)
MIX RATIO EN459* 1 : 2 1 : 2.5 1 : 3 1 : 2 1:2.5 1 :3
7 DAYS   1.96 1.00 0.88 n/a n/a n/a
28 DAYS 5* 2.20 2.00 1.5 10800 1100 10000
6 MONTHS   7.31 5.91 5.31 18000 17050 16900
12 MONTHS   9.28 8.84 6.50 18510 17280 16150
24 MONTHS   10.81 8.81 7.8 21500 18020 17430
Consumption for 1m3
of mortar Kg. +/- 10%
  350 280 233      
EN 459/BS 459 ( mortar ratio 1:1 by volume, with ISO 679 Sand)

Mixing: can be mixed in cement mixers.

Application by spray gun: possible. Please consult us.

Working temperatures: not below 5oC or above 30oC. Make sure that high suction materials are thoroughly dampened before application. Avoid rapid drying due to high temperatures or strong winds by curing with a light water mist several times a day if necessary. See "Protecting Lime Mortar".

SUITABLE FOR LATH WORK / LIME CONCRETE/INJECTION/GROUTING See relevant sheets

Reworking: possible within 8 hours

Mortar composition: MASONRY/POINTING/CAPPING/MASS WALL BEDDING/ FOUNDATION/SEA DEFENCE WALLS/CHIMNEY STACS/NEW BUILD (Masonry)

Depending on the conditions of the support/background, the fineness of the sand and the size of the joints, binder : sand ratio values vary between 1: 1.5 to 1: 2.5

Choose well graded sands (3 or 4mm down to 75 microns).
See also "Applications & Good Working Practices - Sands for Lime Mortars".

RENDERING
A. Scratch coat (3 - 5mm) 1 VOLUME OF NHL 5 : 1.5 VOLUMES OF SAND Cast on recommended
B. Undercoat (15-20mm) 1 VOLUME OF NHL 5 : 2 VOLUMES OF SAND * (1:2.5 max)
*At this dosage the consumption is approx 0.4 kg. of NHL 5 per m2 for each mm of thickness
C. Finishing (5-10mm) USE NHL 3.5 OR NHL 2, see relevant sheets

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