Power Float † a hand-operated electric motor or petrol engine,
surmounted over a mechanical surface skimmer. Machines are
provided with an interchangeable revolving disc and a set of
blades. These are used in combination to produce a smooth, dense
and level surface finish to in-situ concrete beds.The advantages offset against the cost of plant hire are:* Eliminates the time and materials needed to apply a finishing
screed.
* A quicker process and less labour-intensive than hand troweling.Application † after transverse tamping, the concrete is left to
partially set for a few hours. Amount of setting time will depend
on a number of variables, including air temperature and humidity,
mix specification and machine weight. As a rough guide, walking on
the concrete will leave indentations of about 3†4 mm. A surfacing
disc is used initially to remove high tamping lines, before two
passes with blades to finish and polish the surface.Concreting Plant