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.