The object of this apparatus is to determine the
polished stone value which gives a relative measure of the extent to which
different types of road stones in the wearing surface will polish under
traffic. The complete apparatus consists of the following:
Meets: - IS: 2386 (Part 4),
- An accelerated polishing machine.
- A friction tester.
- IS test sieves of sizes 10mm., 8.0mm.(both perforated plate),
425micron, 300micron, 212micron, 150micron.