General Purpose Multi Use Mortar for New Build Using Clay Blocks

St Astier Limes and Mortars

Hourdex Multi Use Binder for New Build

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 24h			3 N/mm2	BS459
7 days			10.15 N/mm²	BS 459
28 days			15.2 N/mm²	BS 459
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
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.
Damp Courses: Hourdex mortars can be waterproofed to provide a damp course.
Adequately dampen materials or background if too dry or with high suction.
Temperatures: do not work in temperatures below 5^oC or above 35^oC. 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
Bricks and Blocks
Floor Tiling
Roofing
Chimneys
Render (base coat)
Manual Application
Sprayed Application

Hourdex
1 bag (35kg)
1 bag (35kg)
1 bag (35kg)
1 bag (35kg)

1 bag (35kg)
1 bag (35kg)

Sand (0-3mm)
120 litres
120 litres
100 litres
90 litres

100 litres
80 litres (+/-10%)

By Volume
1:3 Sand
1:3 Sand
1:2.5 Sand
1:2.25 Sand

1:2.5 Sand
1:2 Sand

General Purpose Mortar for New Build using Clay Masonry Blocks