Planing removes multiple layers (in excess of 2mm thickness) i.e. latex, screeds, adhesives, contaminants and thermoplastic compositions. It also reduces levels more efficiently than any other method.
The finished profile is dependent on the size of machine selected and the flails or picks attached to the drum. There are four types of flails; TCT, Milling, Beam and Star:
TCT flails create a deep grooved profile and are used to clean and texture concrete, asphalt and stone and to remove screeds and coatings.
Milling flails create a gentle profile, with less impact on the background surface and are particularly effective in removing thermoplastic lines markings and bitumous and rubber deposits.
Beam flails are less aggressive and gently clean surfaces without damage to concrete. They also remove soft compositions and finally, Star flails are used for removing ice deposits.
Planing can be applied in damp conditions. It is important to note that if the surface is too hard the machine can ‘bounce’ across the surface, rather than cutting into it.
The resulting profile will be rippled, so is unsuitable for applying a coating. It is suitable for screeds or to achieve anti-slip properties.
GRINDING AND POLISHING
Grinding produces a flat, level and smooth profile and can be followed by polishing to create a low maintenance surface.
It is used for removing paint, coatings, thin adhesives, latex and levelling compounds. It is also used to smooth and clean concrete, asphalt, stone and terrazzo.
Instead of the application of a flooring system, grinding and polishing can achieve the finished polished result on terrazzo, granite, marble, concrete and resin decorative surfaces.
Grinding won’t work on deep/tamped concrete or if the surface is uneven, the high spots will be ground and the lower ones largely ignored. It also won’t remove self levelers or screeds that are in excess of 5mm and definitely won’t remove vinyl or carpet! Wet grinding can be carried out for polishing operations.