MI.SA-1007 Deval Abrasion Testing Machine
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Devel Abrasion Testing Machine
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This machines used the for determination of
resistance to wear by attrition iron cylinders 20 cm. dia 34 cm. long with
dust and water-tight covers, mounted on shaft with their axis inclined at 30
deg. to the axis of rotation of the shaft. Rotation speed is 30-33 rpm.
MI.SA-1008 Dorry Abrasion Testing
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Dorry Abrasion Testing Machine
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This is for aggregates resistance to abrasion. The
apparatus consists of a metal disc which revolves in a horizontal plane on a
vertical shaft. A suitable attachment for holding the specimen with is axis
vertical and its lower end pressed with a prescribed pressure against the
surface of the disc (the distance from the centre of specimen to the centre
of shaft being 25 cm) is provided. A convenient funnel for feeding sand
continuously upon the rotating disc is also provided. The machine is fitted
with a ¼ h.p. electric motor, driven through a reduction gear to give
28-30 revolution of the disc per minute. Suitable for operation from 220/230
volts single phase, A.C. supply
Meets :- BS:812
MI.SA-1009 Accelerated Polishing Machine
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Accelerated Polishing Machines
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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:
- An accelerated polishing machine
- A friction tester.
- IS test sieves of sizes 10mm., 8.0mm.(both perforated plate),
425micron, 300micron, 212micron, 150micron.
Meets: - IS: 2386 (Part 4),
MI.SA-1010 Friction Tester
A pendulum arm, having a spring-loaded rubber slider
on the pendulum foot. Device is placed on the portion of the road surface to
be tested. It is then leveled, and the height of the center of suspension of
the pendulum is adjusted to a fixed value which is read on a special gauge.
The pendulum is then released from its horizontal position, to swing down
freely until the rubber slider contacts the test surface. As the slider
travels across the surface for a fixed distance, the pendulum is slowed and
a frictionally-constrained pointer affixed to the pendulum arm measures the
highest point in the pendulum arc.
Meets: - IS: 2386 (Part 4), ASTM E303.
