Polished Stone Value | PSV

Polished Stone Value | PSV

The Polished Stone Value (PSV, in french Coefficient de Polissage Accéléré CPA) indicates the resistance of aggregates to polishing under traffic.
The sample undergoes a double polishing by two abrasive powders made up of Corundum (one being coarse, the other rather fine), aluminous silicate, with a hardness just lower than that of diamond (9/10 on the hardness scale of Mohs). The residual roughness of each polished mosaic, saturated with water, is measured using a friction pendulum (S.R.T pendulum) which indicates the loss of kinetic energy.
Each wheel intended to be polished comprises six distinct samples, ie 12 pads, to which are added two so-called reference pads (CPA aggregate = 52.5, constant value). Each wheel undergoes two 3-hour polishing cycles, one with coarse emery, the other with fine emery. Friction measurement on each pad. The latter is repeated 5 times and only the average of the last three values is retained.
The final result is the average S of the four test specimens (2 per wheel) compared to the average C of the four reference test specimens.

EN 1097-8

Polished Stone Value | EN 1097-8

Machine de polissage accélérée PSV

ACCELERATED POLISHING MACHINE

Specifications

Machine for the preparation of test specimen subjected to the friction pendulum according to EN 1097-8

The aggregate samples are attached to a wheel (14 positions), which rotates in contact with a rubber wheel applied with constant force on the surface of the aggregates.

An abrasive load is applied to simulate the effect of tires in regular traffic.

Description

  • Sample wheel: up to 14 simultaneously
  • Rotation speed from 310 to 330 rpm
  • Digital control panel
  • Coarse abrasive tank
  • Fine abrasive tank
  • Water reservoir
  • Security standard CE

Characteristics

  • Powering : 220 V – 50 Hz – 750 W
  • Dimensions (LxlxH, mm) : 1800 x 820 x 600 mm
  • Weight: about 175 kg

Included

  • 1 rubber wheel for fine abrasive
  • 1 rubber wheel for coarse abrasive
  • 4 molds and 2 preparation plates

*To be ordered seperately

  • Pendulum PSV Ref F025.175.0113
  • Mold Ref. F025.175.1281
  • Plate Ref. F025.175.1282
  • Coarse abrasive 25 kg Ref F025.175.1283
  • Fine abrasive 5kg Ref. F025.175.1284

F025.175.1280

Pendule PSV

PENDULUM FOR MEASUREMENT

Specifications

Pendulum for Polished Stone Value | PSV

Included

  • PSV pendulum and roughness measurement
  • Metal base on anti-friction adjustable height tripods
  • Plexiglass measuring strip
  • Thermometer -10 … 110 ° C
  • Adjustment tools
  • Wash bottle
  • Delivered with transport case

Dimensions: 730x730x330 mm

Weight: around 32 kg

F025.175.0113

Accessories

PREPERATION PLATE

Specifications

Plate according to EN 1097-8

F025.175.1282

SAMPLING MOLD

Specifications

  • Molds to prepare the specimen to be placed on the wheel of the Accelerated Polishing machine
  • Up to 14 samples simultaneously

F025.175.1281

COARSE ABRASIVE | 25 KG

Specifications

  • Coarse abrasive charge used during the accelrated polishing of agregates as per EN 1097-8
  • Bag of 25 kg

F025.175.1283

FINE ABRASIVE | 5 KG

Specifications

  • Fine Abrasive charge used during the accelerated polishing of agregates as per EN 1097-8
  • Bag of 5 kg

F025.175.1284