SpECgrout C3 is recommended for grouting gaps
where the thickness is not less than 75mm and not
greater than 500mm.
In general, pre-bagged cementitious grouts without
aggregate are only suitable for gaps up to 100mm.
Grouting larger gaps normally requires the addition of
larger aggregate to reduce the exotherm produced
during the hydration process and the consequent risk
of thermal cracking.
SpECgrout C3 contains aggregate that reduces
excessive heat build up making the product especially
suitable for deep voids under machine base plates,
voids around and beneath ground tanks and large bolt
pockets
· Unique non-metallic shrinkage compensation
system providing maximum contact between
baseplate and hardened grout.
· Extremely high flow characteristics with
excellent retention of flow.
· Suitable for placing by pump.
· Extremely low permeability.
· High compressive strength at early stages
allowing minimal downtime on machinery
· No requirement for site addition of aggregate.
Preparation
The substrate must be clean and completely free
from contaminants including greases, oil and loose
material.
To avoid absorption and reduction in flow characteristics, it is essential that the prepared substrate is
soaked with clean water for a few hours prior to
grouting. Prior to placing the grout any water remaining on the surface should be removed by blowing
clean with oil free compressed air.
The underside of the base plate to be grouted should
be clean and any oil or grease MUST be removed. The
underside should preferably have no geometry, which
would impede the flow of grout. Should cruciforms be
present, it is essential that air release holes are drilled
through the base plate to avoid trapping air hence
reducing the total contact area.
All formwork should be sealed to prevent loss of grout
during pouring. The formwork should be tight to the
base plate and parallel to the direction of flow. A gap
of around 100mm is required at the pouring hopper
with a gap of around 50mm at the opposite end.
Cross Section of typical grouting formwork
Mixing
SpECgrout C3 is a one-part cementitious grout.
SpECgrout C3 must be mixed using a slow speed
electric drill fitted with a suitable mixing paddle (SpEC
Technical Department can advise). This method is
suitable for small quantities and for larger quantities it
may be necessary to consider the use of a grout pump.
Please contact SpEC Technical Department for
more advice on the type of pumps available.
Good planning is essential to ensure a continuous
flow of grout once pouring commences.
The specified water quantity
should be measured
in an accurately graduated
vessel and added to the
mixer. The bagged powder is
then added slowly whilst mixing. A mixing time of not less than five minutes is
required to ensure adequate dispersal of the
ingredients.
The recommended water used per 25kg bag is 3.0 to
3.3 litres.
The product cannot be mixed by hand
Application
The grout should be poured immediately after mixing
and certainly not more than 20 minutes after mixing is
complete to take full advantage of the high flow
properties.
Again, planning is imperative to ensure that sufficient
grout is available to allow continuity of placing. The
mixed product should always be poured from the hopper end of the formwork. On no account should grout
be poured from more than one side of the base plate.
Maintenance of a fluid head is essential to avoid air
entrapment.
Once the grouting has been completed, all exposed
areas of grout should be cured immediately using
SpECcure AC curing membrane.
SpECgrout C3 is supplied in 25kg bags. Each bag
when mixed with water will provide approximately
12.5 litres of mixed material.
Contact us for more info.
