Mechanical KBVA patching
The mechanical KBVA patching method and equipment developed by Piki-Team Oy represent the best expertise currently found in Finland for the repair of 1-10 cm initial perforations and grooves. Our equipment provides utility model protection.
As masses, we use, e.g. KBVA 4-6 mm rubber bitumen mastic asphalt, VA 4-6 mm mastic asphalt and 3 mm rubber bitumen and soldering mastics. The heat chain of the mass and continuous mixing is not interrupted at any point between the asphalt boiler and the distributor: the mass remains homogeneous and at an even temperature in a closed 1,000 kg mass container, due to the blend and thermostat heating.
Distribution is handled in the Dumper by means of the assembled equipment. The work spacing width is 10-100 cm, depending on the requirements of the site. There are separate hydraulic tilters in each spreader that take the road surface changes into account and make the edge seam almost without any indentation. A hydraulic compressor in the spreader presses the casting mass tightly against the platform with 15 kN strength, ensuring adhesion of the mass to the road surface. Adhesion of the mastic asphalt is prevented by means of the liquid gas heating therein.
If the patching residue requires gritting, there is hydraulically-operating sanding equipment in the Dumper for the purpose.