Saint-Astier® NHL 3.5: The Versatile Lime
Technical Data Sheet
Conforms to European Norms EN 459 and BS 459
Strength factor: 3.5 (Moderately hydraulic)
Residue @ 0.09mm: 6.5%
Bulk density: Approx. 650g/litre
Free lime after slaking Ca(OH)2: >28%
Packing: 25kg bag
Contains no additives.
Whiteness index: 72
Surface cover (cm2 per gram): 9,000
Expansion : <1mm
Quicklime residue after slaking: <1%
Shelf life: 1 year from production date if kept sealed and dry
| MORTARS | Compressive strength - N/mm2 | Elasticity Moduli (Mpa) | |||||
|---|---|---|---|---|---|---|---|
|
MIX RATIO |
EN459* |
1 : 2 |
1 : 2.5 |
1 : 3 |
1 : 2 |
1 : 2.5 |
1 : 3 |
|
7 DAYS |
|
0.75 |
0.57 |
0.53 |
|
|
|
|
28 DAYS |
3.5* |
1.88 |
1.47 |
1.34 |
9,010 |
9,000 |
8,070 |
|
6 MONTHS |
|
7.1 |
5.34 |
3.94 |
15,260 |
13,501 |
13,150 |
|
12 MONTHS |
|
7.5 |
5.90 |
3.90 |
15,280 |
13,620 |
13,150 |
|
24 MONTHS |
|
8.63 |
6.00 |
3.97 |
17,480 |
13,785 |
13,670 |
|
Consumption for 1m3
of mortar (kg +/- 10%) |
|
305 |
244 |
216 |
|
|
|
|
EN 459/BS 459 (mortar ratio 1 : 1 by volume, with ISO 679 sand) |
|||||||
Suitable for:
> Masonry, consolidation, grouting
> Plastering, rendering, pointing
> Decoration, finishing
Before starting, always try on a small test area.
Mixing
Can be mixed in cement mixers.
Application
Application by spray gun is possible. Please consult the Saint-Astier® Technical Department: technical_support@saint-astier.com
Working temperatures
Not below 8°C or above 30°C. Dampen the substrates the day before and prior to application, allowing the surface water to be reabsorbed. Avoid rapid drying due to high temperatures and/or strong winds by covering and curing with a light water mist as necessary. Protect wet mortars from frost for at least 10 days after application. See Protecting Lime Mortar.
Reworking
Possible within 12 hours.
Mortar composition
1) For masonry, pointing, capping, bedding, ashlar:
NHL 3.5/sand ratio > from 1:1.5 to 1:3 depending on the background conditions, the size of the joint and the fineness of the sand. Always use well graded sands (3-4mm down to 75 microns). See Sands for Lime Mortars.
2) For rendering:
A. Scratch coat (3-5mm) > NHL 3.5/sand 1:1.5 (cast on recommended)
B. Undercoat (15-20mm) > NHL 3.5/sand 1:2*
*At this dosage the consumption is approx. 0.35kg of NHL 3.5 per m2 for each mm of thickness.
C. Finishing (5-10mm) > NHL 3.5/sand 1:2.5 (with very fine sands possibly containing clays the binder content may need to be reduced)
See NHL Renders.