Pure and Natural Hydraulic Lime (NHL 3.5) Product Data
St Astier Natural Hydraulic Limes (NHL)
| 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 |
| 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 | 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) | |||||||
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 12 hours
Mortar composition: MASONRY/POINTING/ CAPPING/ BEDDING/ ASHLAR
Binder: sand ratio: from 1:1.5 to 1:3 depending on the support/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 also “Applications & Good Working Practices Sands for Lime Mortars” .
RENDERING
A. Scratch coat (3-5mm) 1 VOLUME OF NHL 3.5 : 1.5 VOLUMES OF SAND – Cast on
B. Undercoat (15-20mm) 1 VOLUME OF NHL 3.5 : 2 VOLUMES OF SAND*
C. Finishing (5-10mm) 1 VOLUME OF NHL 3.5 : 2.5 VOLUMES OF SAND
With very fine sands possibly containing clays the binder content may have to be reduced.
*At this dosage the consumption is approx. 0.35kg. of NHL 3.5 per m2 for each mm thickness.
Please also refer to “Applications & Good Working Practices – NHL Renders.”
For further Guidance, contact your St Astier Distributor.
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