NHL Mortar preparation: can
be mixed in normal Mortar mixers.
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Put approx two-thirds the amount of water, one third the amount of sand
and all the lime followed by the remaining amount of sand and additional
water until the required consistency is achieved. Mortar should be mixed
for at least 10 minutes. Greater workability and better mortar performance
is achieved with less water and longer mixing.(Mortars can be left to stand
and fatten up for up to 1-3 hours depending on the mix: and tempered before
use.)
Sand: For building, pointing, base coats and coarse finishes on renders
/ plasters always use a well graded sharp sand free of silt and clay #10-
20 mesh down to #No 200. For finer work: use a fine well graded sharp sand
free of silt and clay #100-150 mesh down to #200. (In some circumstances
where very fine sands are being used, less binder will be required).
St Astier Natural Hydraulic Limes can be used for a wide variety of purposes.
Typical mix composition.
Volume Ratios |
Cubic feet of Mortar produced |
Some typical applications
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1 bag NHL5 : 1.5 bags of sand
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2.9 |
Pricking up coat.
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1 bag NHL 5 : 2 bags of sand
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3.0 |
Coping,
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1 bag NHL 5 : 2.5 bags of sand
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3.8 |
Building / render / float / pointing
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1 bag NHL 5 : 3 bags of sand
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4.5 |
Building / render / float / pointing
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Protection |
Protect from adverse conditions for at least 72 hours, longer if
conditions persist |
Curing |
Fine mist spray as required |
Caution |
Do not use in temperatures below 40 F or above 80F |
Reworking/Tempering |
Can be tempered for up to 8 hours |
Injection |
1 bag NHL 5 10.5 Gallons of clean water. Mix with whisk.
If casein is used water content can be reduced |
Gravity Feed |
1 Bag NHL 5 : + 16.9 Gallons (2.4 ft Cubic ft approx
) fine sand. Add water to required consistency |
.
Main Rules : Do not over saturate
with water, mix well, use well graded sands.
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