Grundfos NBG Series - Foundation Grouting; Grouting Procedure for Base Frames

English (GB)
18
3: Grouting
Grouting compensates for an uneven foundation,
distributes the weight of the unit, dampens vibrations
and prevents shifting. Use an approved, non-
shrinking grout. If you have questions or doubts
about the grouting, please contact an expert on
grouting.
Step
Action
Illustration
1
Embed reinforcing steel bars into the
foundation by means of 2K anchor adhesive
glue.
The number of steel bars depends on the
size of the base frame, but it is advisable to
distribute a minimum of 20 bars evenly over
the whole area of the base frame.
The free end of the steel bar should be 2/3
the height of the base frame to ensure a
proper grouting.
TM04 0490 0708 - TM04 0491 0708
2
Soak top of concrete foundation thoroughly,
then remove surface water.
3
Ensure proper shuttering at both ends of the
base frame.
TM05 1562 3011
4
If necessary, check the levelling of the base
frame again before grouting. Pour non-
shrinking grout through the openings of the
base frame until the space underneath the
base frame has been filled completely.
Fill the formwork with grout up to the base
frame top level.
Allow the grout to dry thoroughly before
attaching piping to the pump (24 hours is
sufficient time with approved grouting
procedure).
When the grout has thoroughly hardened,
check the foundation bolt nuts, and tighten,
if necessary.
Approximately two weeks after the grout has
been poured, or when the grout has
thoroughly dried, apply an oil-based paint to
the exposed edges of the grout to prevent
the grout from getting into contact with air
and moisture.
TM03 2946 4707
Minimum 20 bars
Shuttering
5-10 mm
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Base frame
Grout
Levelling
wedges or
shims left in
place
Top of
foundation -
rough
19-32
mm grout
Formwork