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Grundfos NK Montage- Und Betriebsanleitung Seite 21

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4: Grouting
Grouting compensates for uneven foundation, distributes weight of 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
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
1
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.
Soak top of concrete foundation thoroughly, then remove
2
surface water.
3
Ensure proper shuttering at both ends of the base frame.
Check the levelling of the base frame again before
grouting, if necessary. 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 grout to dry thoroughly before attaching piping to
pump (24 hours is sufficient time with approved grouting
procedure).
4
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 air and moisture from getting in contact with the
grout.
Illustration
Shuttering
Base frame
19 to
32 mm
grout
Formwork
Min. 20 bars
Grout
Levelling
wedges or shims
left in place
Top of foundation
(rough)
21

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