Lime Mortar Mix Ratio

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Lime Mortar Mix Ratio
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Natural Hydraulic Lime mortar consists of two
building materials, lime and sand. They can be
used for a variety of applications for laying
brickwork, bedding tiles, rendering and
plastering. By using appropriate sharp sand will
help the mortar have excellent workability,
whilst keeping a consistent water retention when
applied to bricks, blocks and bedding surfaces.
Using a lower strength of natural hydraulic lime
mortar when compared against Portland cement
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will work together and complement natural stone
and soft brick applications whilst improving
plasticity and retaining a high level of solidity
with a reduction of shrinkage. Otterbein Natural
Hydraulic Lime mortars have exceptional
resistance to sulfates from ground waters or in
the masonry itself. Otterbein NHL 3,5 and NHL 5
mortars should use a ratio of 1 4 1/2 and 1
31/2  which has are less susceptible to freezing
and thawing actions.
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Lime Mortar Mix Ratio Method
Natural hydraulic lime mortars gain strength by a
mixture of hydraulic action and carbonation. It
is important to be careful with the mix
proportions of mortars. Generally, lime mortar
mix ratio for brickwork ranges from 13 to 15
depending on the strength
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The mix proportions provide below are a guide
from which a mix can be selected to suit the
construction and local environmental conditions.
Other aspects, such as the type of brick or
stone, or the sand being used will affect the
final mix. It is strongly recommended that trial
mix is carried out prior to commencement of work
to ensure that the mix design and material
combinations meet the requirements of the
specification and method of use
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Our range of Otterbein hydraulic lime binders can
used for lime render, lime plaster and lime
mortar. Otterbein hydraulic lime binders use the
highest quality lime and designed specifically
for listed buildings and conservation projects to
give you the best authentic restoration finish.
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