(57) A system of a concrete floor and a concrete floor levelling device, wherein the concrete
floor comprises a floor reinforcement having reinforcement profiles, which have a
mutual spacing; and concrete, which has been poured over the floor reinforcement and
is still fluid or viscous. The concrete floor levelling device comprises a blade carriage
suitable for, during use, being moved in a direction of travel over the concrete floor,
so that the still fluid or viscous concrete behind the blade carriage is levelled
by the concrete levelling device; and a levelling blade coupled with the blade carriage
such that, during use, the levelling blade is kept at a defined height on the concrete
floor, whereby the concrete floor is levelled by the levelling blade. The blade carriage
is provided with at least one wheel set, which is/are constructed and arranged to
each bear a therewith associated part of the blade carriage on a reinforcement profile
transversely to the direction of travel. Each wheel set comprises at least two wheels,
each having its own rotation axis, which rotation axes are displaced with respect
to each other over a spacing in a direction transversely to the rotation axes and
parallel to the direction of travel of the concrete levelling device. The spacing
between the rotation axes is unequal to the spacing between the reinforcement profiles
or a multiple thereof.
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