In a 2,700 sqm underground parking garage of an apartment complex in Elmshorn, the floor was heavily weathered by de-icing salt and had to be recoated. The garage was renovated in 2 sections in order to keep at least 50 % of the parking space capacity available. The area needed to be ready for use again as quickly as possible, so the client opted for a system based on VELOSIT SC 253.
To prepare the substrate for the first section of approx. 1,400 sqm, the old concrete was milled off and the surface was then shot-blasted. In the next step, an epoxy resin primer with full-surface sanding was applied. The following day, a self-leveling cementitious industrial floor based on VELOSIT SC 253 was installed with a 0 – 1 mm sand aggregate in a layer thickness of approx. 6 mm. The mixture was mixed in a Bremat S 3.17 pump truck and pumped at a rate of approx. 6 tons per hour. The plant could theoretically also deliver up to 20 tons per hour, but this could not be installed in this layer thickness with 3 employees. Due to the roughness depths, around 11 kg/m² was used, so that 16 t could be laid in the first section in just under 3 hours. The surface could be walked on without restriction after 3 hours and could be driven on again the following day. At this point, the compressive strength was already over 40 MPa. The final strength is between 60 and 70 MPa.
A total of almost 30 tons of VELOSIT SC 253-based floor leveling compound was used in both construction phases. The client is very satisfied with the surface and is already planning further projects with the system.
