Polishing value
The polishing value ( engl. : Polished stone value - PSV) is a measure of the resistance of a mineral substance to the polishing effect of vehicle tire and serves as a characteristic value in the road construction . In order to ensure safe traffic flow, high demands are placed on the grip of asphalt surface courses .
Requirements
The ZTV-Asphalt StB 01 defines requirement values for the high-grade chippings and high-grade crushed sands of surface courses. A PSV ≥ 50 must be observed for roads in construction classes SV to III (with special traffic). For construction classes III (normal use) to VI, a PSV ≥ 43 is decisive.
In order to achieve sufficient grip on newly built asphalt surfaces, in addition to the use of high-quality aggregates (high polishing resistance), the surfaces must be blunted with crushed sand .
swell
- Joachim Lorenz: Road Construction Manual , Fraunhofer IRB Verlag, 2006, ISBN 3-8167-7083-5