Saint-Astier® NHL 3.5

Technical data sheet

Conforms to European Norms EN 459 and BS 459
Strength factor: 3.5 (Moderately hydraulic)
Residue @ 0.09 mm: 6.5%
Density (volumetric weight) : typical 650gr / litre
Available (free) lime after slaking Ca(OH)2: 25% +
Packing: 25kg. Bags

Contains no additives.
Whiteness index: 72
Surface cover (cm2pergram): 9000
Expansion : < 1mm
Residue of quick lime after slaking: < 1%
Shelf life: 8-12 months kept sealed and dry

Conforms to European Norms EN 459 and BS 459
Strength factor: 3.5 (Moderately hydraulic)
Residue @ 0.09 mm: 6.5%
Density (volumetric weight) : typical 650gr / litre
Available (free) lime after slaking Ca(OH)2: 25% +
Packing: 25kg. Bags

Conforms to European Norms EN 459 and BS 459
Strength factor: 3.5 (Moderately hydraulic)
Residue @ 0.09 mm: 6.5%
Density (volumetric weight) : typical 650gr / litre
Available (free) lime after slaking Ca(OH)2: 25% +
Packing: 25kg. Bags

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
9010
9000
8070
6 MONTHS
7.1
5.34
3.94
15260
13501
13150
12 MONTHS
7.5
5.90
3.90
15280
13620
13150
24 MONTHS
8.63
6.00
3.97
17480
13785
13670
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
Lathwork, lime concrete, injection, grouting, rendering, pointing, capping, masonry, ashlar. 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 us.

Working temperatures
Not below 8oC 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.

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 thickness.
C. Finishing (5-10mm) > NHL 3.5/sand 1:2.5 (with very fine sands possibly containing clays the binder content may have to be reduced)
See NHL renders.