Wall and Floor Preparation
Concrete Removal- Scabbler process
Gnat UK specialise in removal and renovation of concrete surfaces, such as floors, walls etc. Compared to other methods, the scabbler avoids problems that arise when water is used and there is no risk of cracking when working on bridges or in tunnels. A Scabbler operates by pounding a number of steel or carbide tipped teeth, onto the concrete surface in rapid succession. The purpose being to removed a layer from the surface in preparation for further work, such as resurfacing and testing.
Concrete Planing- Cold Milling Process
Cold Milling involves the selective removal of the top layers of existing ashphalt and concrete surfaces to a desired depth, so as to enable repairs and upgrades with the minimum of disruption. Cold Milling machines are available in a variety of sizes enabling a range of operations, from localized milling around manholes and valves, through to high capacity machines capable of milling up to 4.9 m wide and over 300 mm deep in just one pass. The cutter drum comprises replaceable tungsten carbide cutting tools and most are equipped with automatic grade control systems to control the milling process.
Screed Removal Project
GNAT UK was commissioned to devise a method for the removal of an area of Concrete Screed that had failed to bond. The 500 square metre area was within an existing shopping mall with trading stores, surrounded by residential areas and hotels and could only be removed during a restricted Five hour working shift.
To assist removal, and to shorten the contract duration, Gnat cut through the screed at intervals, using a 3 phase electric Diamond Floor Saw. A Brokk 150 Robotic Demolition machine, which came within the floor loading tolerances specified by the structural engineer was delivered to site and planed the screed with its SB200 planer.
The screed was moved from the work area to the skips using a Liquid Petroleum Gas (LPG) fuelled Skidsteer, further reducing harmful exhaust fumes and eliminating the heavy particulates, produced by diesel, that can lead to staining of new and existing finishes.
The works were completed within programme and budget and in full compliance with regulations