HOURDEX a multi use binder
St Astier Natural Hydraulic Limes (NHL)
For building mortars, renders stipple and base coats, roofing, chimneys,
floor tiling.
Based on St. Astier natural hydraulic lime with addition
of OPC and additives for highly workable and breathable mortars.
| POWDER | Test std. | MORTAR (sand 0-3mm, Volume 1:3) | Test std. | |
|---|---|---|---|---|
| Dry Density | 800 g.l. +/-10% |
BS459 | 1425g.l +/- 25g dry 1650g.l +/- 50g wet |
EN1015-11 EN 1015-6 |
| Whiteness | 40.55 | NFX08.012 | ||
| Workability (depending on water addition) | 210mm +/- 10mm | EN1015-3 | ||
| Water retention | 81% +/- 3% | CSTB 2669-4 | ||
| Compressive strength 24 hrs 7 days 28 days |
1.5 N.mm2 4-5 N.mm2 6-7 N.mm2 |
BS998.2 BS998.2 BS998.2 |
||
| Thermal conductivity | 0.540 W/m.K | EN 1745 | ||
| Vapour permeability | 1,60.10-9kg/m2sPa (0.77g x m2 x h x mmHg) | EN 1015-19 | ||
| Elasticity moduli | 7000 – 9000 MPa | CSTB | ||
| Capillarity | 0.75 g.min. | |||
| Fire resistance | Class A1 (with silica or calcareous sands) |
Mortar preparation: Up to 5 minutes in conventional drum mixers.
Sand:
Clean, well graded 0-3mm (general). Lower or higher granulometries can
be adopted.
Avoid monogranular sands. Sands for renders base coats should not be below
0-2mm.
Adequately dampen materials or background if too dry or with high suction. Do not work in temperatures below 5oC or above 35oC. The building materials or background should not be frosty or too hot or water saturated. Protect fresh mortars from frost, rain or strong direct sun. Storage: in dry store. Reseal open bags a.s.a.p
| DOSAGES | HOURDEX | SAND (0-3mm) | By Volume |
|---|---|---|---|
| Bricks, blocks, | 1 bag (25kg) | 85 litres | 1 : 3 sand |
| Floor tiling | 1 bag (25kg) | 85 litres | 1 : 3 sand |
| Roofing | 1 bag (25kg) | 70 litres | 1 : 2.5 sand |
| Chimneys | 1 bag (25kg) | 65 litres | 1 : 2.25 sand |
Renders (base coat) |
1 bag (25kg) 1 bag (25kg) |
70 litres 60 litres (+/-10%) |
1 : 2.5 sand 1 : 2 sand |
The above details are given for general information purposes and do not constitute a specification. For further Guidance, contact your St Astier Distributor.