Movement
calculations
The calculation is based on movements caused by thermal dilation
and contraction, leaving the consideration of other movements to
the judgement of the designer, which must be taken into account if
they are sure to occur.
Dilation and contraction are determined by applying the following
formula:
ΔL = increase in length
due to temperature
_ = thermal dilation coefficient for the material
L = length perpendicular to the joint
Δ
T = temperature variation
Determining the joint width
In order for the sealant to work within its field of elasticity,
the width of the joint must be determined by the formula:
a = minimum width of the joint
Δ L = lengthening due to temperature
m = movement capacity of the sealant as a %
This value indicates the minimum width that the joint must have
in order for the sealant to work with full guarantees. The maximum
width of the joint is determined by the technical properties of
each specific sealant.
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