FLOORING
GRINDING Grinding would be selected when
a flat, level and smooth concrete profile is required. It removes contaminants, adhesives, paint, sealers and coatings and cleans.
Grinding models are available in single phase or three-phase electric and in single head, double head, and multi-head versions. There are also diesel and petrol powered alternatives and variable speed models which can be fitted with provision for wet grinding and polishing applications.
The grinding principle is achieved by diamond, tungsten or resin-bonded plates or discs which are secured to the single or multiple rotating heads for removing adhesives and coatings and for grinding, smoothing and polishing decorative screeds and concrete screed.
“IT IS IMPORTANT TO NOTE THAT SHOTBLASTING WILL PRODUCE ‘TRAMLINING’.”
As a general rule, hard compositions will require a soft bond diamond and soft compositions a hard bond. Selection is important; otherwise the machine will simply glaze over the surface without creating the profile or will ‘wear out’ extremely quickly in the initial stages of the operation.
Grinding is not recommend if the surface is uneven or on “tamped” concrete.
SHOTBLASTING In the correct conditions,
and beam flails for removing soft material compositions. Picks can remove and reduce materials in excess of 2mm and up to 25mm.
www.tomorrowsfm.com
Shotblasting is one of the most cost effective methods of preparation, selected to clean and key power- floated concrete, to remove coatings, light surface contaminants and for steel preparation. Surfaces must be sound/hard: shotblasting is not suitable for removing or treating soft compositions or materials in excess of 2mm in thickness.
When concrete is not finished correctly or if it has been brushed or tamped, the surface may have a large degree of laitance which has to be removed to achieve a sufficient bond for the specified material to be applied: shotblasting is ideal for this.
Shotblasting machines are available in walk-behind 110v single phase and three-phase electric and ride on versions. The model number usually relates to the operating width.
The process involves steel abrasive being propelled onto the surface, the desired profile determined by the grade and speed of the machine. The debris is collected in a vacuum/ filtration unit, for disposal and the shot re-cycled.
It is important to note that shotblasting will produce ‘tramlining’. This can be minimised with operator experience but not eliminated. Shotblasting will also highlight defects in the background surface.
Shotblasting cannot be applied in wet or damp conditions and for optimum results, the process requires a smooth even surface otherwise the shot will escape from the machine.
CLEANING &
MAINTENANCE To get the maximum life out of a finished floor surface, it needs be kept clean and in good working order.
Heavily trafficked surfaces that have become scratched, stained and contaminated are not only unattractive but can also be hazardous. Floor finishes such as epoxy, terrazzo, marble, natural stone, concrete and vinyl can be transformed sustainably without the need for harsh chemicals, waxes or polishes.
The solution comes in the form of diamond pads that fit standard scrubbers/dryers to create a hygienic, shiny, yet non slip floor by adding just water, a floor that will help to resist the build up of future residues. As well as the eco-benefits, the eradication of these chemicals also saves on costs.
www.thepreparationgroup.com TOMORROW’S FM | 43
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