S882- ACCELERATED POLISHING MACHINE
DETERMINATION OF POLISHED STONE VALUE
BS812: Part 114: 1989 (Pr EN 1097-8)
FunctionThe PSV test calculates a Polished Stone Value for aggregates used in road surfaces, which gives a measure of the resistance to skidding.
The test is carried out by using two machines, S882 - the Accelerated Polishing Machine, and S885 - Skid Tester, (see separate Data Sheet for this machine). The Accelerated Polishing Machine polishes samples of aggregates, simulating actual road conditions.
Test ProcedureFourteen specimens are clamped around the ‘road wheel’ of the PSV machine, and subjected to two stages of polishing by a loaded rubber tyre. First by corn emery, and secondly by emery flour.
Relevant StandardsBS 812 Pt 114: 1989, EN 1097-8, ASTM E303 copy of these documents are necessary to understand and carry out the test.
Users of the TestLocal Authorities, Consulting Engineers, Contractors, Asphalt Producers, and Civil Engineering Departments of Universities.
Road SafetyUse of the PSV s in road construction has had a major influence in reduction of accidents.
SuppliesCorn Emery, Emery Flour, Control Stone and Criggion Stone can be supplied. Operating instructions and wiring diagrams are supplied with each machine.
Physical DataMachine Packed: Width 73 81 cms x Depth 63 79 cms x Height (Frame) 79 123 cms
Height (Water Tank) 155 cms
Volume .79 cu: metres
Weight 175 205 kg
Electrical Supply 230V/110V. 50/60 HZSingle phase 13 amp.
USA SpecificationMachines can be supplied with 110 V. 60
Hz motors pneumatic tyres and ASTM weight.
Skid Resistance Tester is also required to determine PSV.