Friction improvement on paved surfaces
Even before the criterion of the coefficient of friction on road surfaces in public transport had become a safety issue, the company Röhsler & Co had focused on this problem with their structure-conserving practices.
The combination of 2,500 bar maximum pressure water jets, hydraulic-driven nozzles with variable rotational speed, a carrier vehicle with a hydrostatically driven slow-moving drive, integrated vacuum absorption and nozzles fitted to the current surface allow a structurally protective and reproducible spray pattern.
The improvement of friction is accomplished, inter alia, through the selective removal of the friction-reducing separating layers of binder (in the case of asphalt it is bitumen) and the processing of the polished grain. On the finished surface, a friction coefficient of at least 0.59 my at a measurement speed of 65 km / h measured by using a friction meter (Friction Tester – measurement by means of towed wheel to a defined water film, analog RVS 11 066) are achieved.