Page 22 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

used in pavement surface coatings, basalt and limestone were also chosen for a
comparison of polishing performance with calcined bauxite. The physical properties of
basalt and limestone aggregates meet the Chinese standard specifications (JTG F40-
2017) for the construction of highway asphalt pavements, as shown in Table 2.

EQUIPMENTS:

Accelerated Polishing Machine (PSV) is used to simulate
the polishing action of vehicle tyres on a road surface, for
coarse aggregate which is going to be used as asphalt

road surface covers.

The sample used in the laboratory for the test shall be

taken in accordance with clause 5 of BS 812-102:1984.
The sample shall be taken from the normal run of
production from the plant. NOTE Chippings that have

been freshly crushed in the laboratory or recovered from
bituminous materials may give misleading results.

Higway Engineering Laboratory page 9