Ulma ENKOFORM VMK - Guidelines for Formwork

ENKOFORM VMK
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ENKOFORM VMK
6.1.2 Guidelines for formwork
4.1.2.1 Formwork
 Place some sort of support to store or move the
formwork panels which prevent their damage and
ease the building site order, the panel cleaning
and the transport to their area of operation.
 Ensure the fastening of plate nuts, and the correct
positioning and anchorage of push-pull props to
the ground.
 Special attention should be paid to the fastening
of the wedges of the clamps, holding together
the panel joints to prevent concrete laitance.
 Ensure the correct anchorage of the previous
formwork set, before placing the next.
 Do not leave any part half-assembled or half-
dismantled.
 It is forbidden to climb on formwork except in
extraordinary cases duly studied and with
appropriate protection systems in place.
 Before concrete pouring, make sure the formwork
surfaces are clean.
 Clean panels after each use. Wire brushes are not
suitable for cleaning as they are damaging the
phenolic film of the plywood.
 It is important to state that the phenolic coating
rarely suffers from the chemical and abrasive
action of the concrete. But where it is already
damaged, e.g. at holes and deteriorated areas, it
must be thoroughly sealed to prevent any further
damage to the plywood.
 Any cut edge of the plywood should be sealed as
soon as possible, because cut edges soak up
water from the concrete and swell, thus
increasing in thickness.
 In general, it is not recommended to use nails or
screws on the plywood.
 For storage, the panels should be stacked one on
top of the other, placing wood runners between
them. Use some sort of support to separate them
from the ground, and provide shelter. Prolonged
sun and rain exposure damages the panels.
4.1.2.2 Release agent
 Release agent helps separating the formwork
from the concrete, and thus increases the number
of uses and the life span of the panel in general.
 It plays an important role for the quality of the
concrete finishing because it prevents holes from
air bubbles on the concrete surface and provides
a uniform colour.
 Apply the release agent uniformly and in thin
layers onto the panel, bearing in mind at all times
the instructions for correct use.
 Thoroughly clean the panel surface before
applying the release agent on it.
 Clean the metal frame and the panel off the
release agent after every 4 to 5 uses.
4.1.2.3 Concrete placement and compaction
 Comply with the maximum pressures according to
the instructions of the respective formwork
system.
 Continuously check the state of the formwork
during concrete casting. Stop further casting in
case of any incident.
 Place the concrete in uniform layers of 30 to 45
cm.
 For vertical concrete placement, cast the concrete
from the least height above the formwork
possible. Do never exceed 2 m height unless a
pipe or tube or any similar accessory is used to
channel the concrete. Deposit the concrete as
near as possible to the formwork base, centring