» Rock Testing Instruments
Rock Testing Instruments
Polishing and Lapping Machine
- Compact table model
- 20 cm dia Top and Adopter to hold polishing cloth or paste
- Sample Holders to accommodate upto NX size Cores
- Continuous water feed arrangement during operation
This bench mounted, single spindle lapping machine is ideally suited for
the final polishing of mounted rock or concrete specimens. Two sample
holders of sample size ordered for are provided with each machine as
standard supply. Sample holders of other sizes can also be provided on
request. This is a motor driven unit with 450/500 rpm. A swing-in tap, for
continuous water supply during operation, is also provided. This unit is
operated by a single phase, 230 V, AC motor.
Slake Durability Apparatus
The apparatus consists of a motor on baseboard
capable of driving two or four drums at a speed of 20 rpm. A suitable number
of plastic water troughs, each designed to contain a test drum with quick
release drive assemblies, permit 1 to 4 drums to be driven at one time. The
test drums are supported on water lubricated bearings allowing 40 mm
unobstructed clearances below the drum and a trough water level 20 mm below
the axis of the drum. Drums are made of brass and comprise 2 mm wire mesh
cylinders of 140 mm dia and 100 mm length.
Meets:- IS: 10050-1981
Extra Electrical Timer, 0-30 min Features
Brazilian Test Apparatus
The instrument is designed to test specimens from
50 mm dia to 100 mm dia having thickness equal to half the diameter. A pair
of loading jaws, designed so as to contact a disc shaped sample at
diametrically opposed surfaces over an arc of contact of about 10 degrees at
failure, is supplied. The set of jaws supplied with the equipment is
designed for 50 mm dia specimen and therefore it is essential to order jaws
for respective sizes, if other diameter samples are to be tested. A set of
plain platens are provided with the jack which enable testing of cube and
circular specimens up to 50 mm size for compressive strength.
Meets:- IS: 10082
The outfit consists of
Loading Frame, fitted with hand operated Hydraulic Loading Jack of 200 KN
capacity provided with self-retracting Piston, pair of Plane Platens
Pair of Semi-Circular Jaws, for 50 mm dia samples
Load Gauge, 0 - 200 kN x 2 kN capacity, provided with maximum Load
- Pair of Jaws, for 60 mm dia samples
- Pair of Jaws, for 70 mm dia samples
- Pair of Jaws, for 80 mm dia samples
- Pair of Jaws, for 90 mm dia samples
- Pair of Jaws, for 100 mm dia samples
Pavement Core Cutting Machine
It is widely used for cutting the pavement. The
machine is fitted with a cutter of 16?/14? dia. and has an arrangement to
adjust the height of the cutter with the help of a wheel on the upper side.
It has a coolant arrangement in the form of a water tank. The machine is
duly fitted with belt guard and cutter guard. The machine is driven by 5
H.P. Crompton Greaves diesel engine. The machine is duly fitted with rubber
tyers which makes it easy to shift the machine
Rock Toughness Tester
It is a kind of impact machine which is widely used
for testing the toughness of Rock and has the following features:-
- The machine is built on a solid flat M.S. plate form
- The machine has a cast iron holding device (anvil) weighing 50Kg.
fixed upon a solid foundation.
- The machine is fitted with a striking hammer weighing 2 Kg. arranged
to fall freely between guides.
- The machine is fitted with a plunger made of hardened steel and
weighing 1Kg. and is duly arranged to slide freely in a vertical
direction in a sleeve, the lower end of the plunger, the lower end of
plunger being spherical in shape with a radius of 1 cm.
- The machine is fitted with the mechanism for raising the hammer and
for dropping it upon the plunger from any specified height from 1cm. to
not less than 75cm. and means for determining the height of the fall to
- The machine is fitted with device to hold the cylindrical test
specimen securely in the anvil, without rigid lateral support, and under
the plunger in such a way that the centre of its upper surface shall
throughout the test be tangential to the spherical end of the plunger at
its lower point.
- Suitable operation on 220 volts, single phase, A.C. supply.
Flat Jack Outfit
The equipment comprises the following
Note: Flat Jacks of other different capacities also be manufactured
- Flat Jack 30 cm x 30 cm 1 No.
- Hydraulic Pump, hand operated, with 15 cm dial Pressure Gauge of 70
kg/cm2 capacity with flexible Pressure Pipe of 1 meter length
- Deformeter consisting of a Dial Gauge having 10 mm travel and 0.002
mm least count, and two interchangeable Stems for 150 mm and 250 mm
gauge length 1 Set
- Standard Bar 1 No.
- Reference Pins 6 Nos.
Triaxial Testing Of Rocks
Triaxial Testing System
The strength, of most rocks, increases considerably with increase of
confining pressure. The design engineer needs to carry out triaxial tests at
a range of confining pressures, in order to determine the strength at the
required confining pressure. To suit individual requirements, a wide range
of instruments listed below is offered.
These cells are designed to withstand a lateral pressure of 150 bar (150
kg/cm2). Four no-volume change valves are fitted to the base for measurement
of pore pressure, top drainage, and bottom drainage and for entry/exit of
cell pressure. The cell is nickel-plated and completely rustproof, hardened
and ground pedestals and top loading pads with suitable cantering
arrangements for different sample sizes are provided. The lower pedestals
are provided with radial grooves. The top-loading pad is provided with
spherical seating. Two port holes are provided to observe the sample during
the assembly stage.
- Triaxial Cell, for testing of samples of 35 mm and 50 mm dia
- Triaxial Cell, for testing samples of 75 mm, 100 mm, 150 mm,
AX, BX and NX sizes