IS 2720 (PART XII) (stationary Bushing) For 38mm Dia
Specimen
The cell is useful for testing 38mm dia x 76mm high soil
specimen. Transparent Perspex chamber with anvil and
loading plunger, the cell is easily opened by releasing four nuts of
the tie rods. It is leak proof up to 10kg/cm.sq. Fluid pressure. An oil
plug which can also be used as an air vent is provided for
introducing a thin layer of oil over water. This provides effective
sealing at the plunger for long duration tests. The cell is fitted with
four sleeve packed valves of no volume change type on the base.
These valves are used for cell pressure, pore water pressure,
drainage or back pressure. The loading plunger of the cell has
dial gauge rest.
Loading pad made of Perspex for 38mm dia specimens.
Pair of plain discs made of Perspex 38mm dia 6mm thick.
Pair of porous stones 38mm dia specimen.
Split sand former for 38mm dia specimen.
Sheath stretcher for 38mm dia specimen.
One dozen rubber sheaths for 38mm dia samples.
For synthetic rubber 'o' rings for 38mm dia specimen.
This apparatus is used for measuring pore water pressure and pore air
pressure in soils. This is as per the principals outlined in the book"
measurement of soil properties in triaxial tests" by A.W. BISHOP and D.J.
HENKEL. This is used as an accessories for triaxial test apparatus. Specification
The apparatus consists of a panel for wall mounting on which are fitted
1.0 to 10kg/cm sq x 0.1kg cm. sq. a pressure gauge, bourdon tube
type 15 cm dia. Manometer: Glass u-tube manometer for measuring low positive pore
pressures negative pore measures and checking zero error of pressure
gauge. It is provided with a mercury trap (mercury supplied at extra
cost.) Null indicator made out of clear transparent Perspex with mercury trap
and cursor to indicate the mercury level. Burette: 50ml burette for measuring
the volume change in the soil specimen. Pressure pump fitted with four
sleeve packed valves, operated by means of a hand wheel on the end of
the piston rod which is threaded through the pump cap and gives a
smooth, fine adjustment of pressure.
Copper coil and water reservoir is fitted on board with complete stand
assembly. The unit is tested against leaks up to 10kg/cm sq.
A Single burette, 10ml. Capacity, graduated in
0.05 ml division.
B Single burette, 25ml. capacity, graduated
in 0.1ml. Division.
C Twin burette, 50ml. Capacity graduated in 0.2 ml
divisions.
The unit consists of two glass
graduated burettes of 50ml. 0.2ml.
Capacity enclosed in two Perspex
tubes sealed by two end caps.
Dead Weight Type Oil & Water Constant Pressure System
This device is used to maintain cell pressure constant for a long
duration and the system can be used in place of conventional
constant pressure system using mercury pots where certain
minimum heights are required. Problems like de-airation of
pump, leakage of mercury etc. is eliminated in this system .
This unit is smaller in volume and can be used in mobile
laboratory also. This can maintain pressure in the cell upto
20kg/cm sq. Pressure is maintained constant in the
system by a balancing calibrated weights on a spindle
against a column of oil, operating under constant feed back. Construction:
The system consists of an oil pump continuously driven by an
electric motor during the test period. The internal
components are housed in a strong compact housing. The
piston on which weights are kept rotates with minimum
friction. A transparent oil water vessel is provided to
transmit pressure to the cell. A hand pump provided facilitates
priming and to maintain constant pressure during power
failure Specification:
Range 0-20 bar(0-20kg/cm2)
Steps of pressure 0.5bar (0.5kg/cm2)
Accuracy + 0.5%
Electric supply 230V, Single Phase, 50Hz, AC supply.
Supplied complete with pressure gauge, flow valves,
connecting pressure hose and set of weights to give
maximum pressure of 20 bar (20 kg/cm2)
It is designed for application of cell pressure upto 10kg/cm2
on a triaxial specimen in the triaxial cell. The unit is mostly used in routine tests which last for about 10 to 15
minutes wherein the variations of cell pressure can be tolerated. Specification :
The apparatus consists of a pressure chamber which has a flanged top cap fitted
with a 10 kg/cm2. Pressure gauge and a valve for pumping in air. Water inlet and
drain cock are fitted to the chamber.
The foot pump supplied easily develops a pressure of 10 kg/cm2
Complete with connecting pressure hose.
Note: Also available 20Kg/cm
2
The Load Frame consists of a cabinet which houses the gear system and motor
with sturdy angle iron frame. the loading is done through the bottom loading platen,
which is carried on a lead screw, which advances upwards. the top load
bracket, which slides over two upright pillars, can be positioned at any desired height
and locked. It carries a screw adapter for standard Proving rings and Load Cells.
The loading part of the unit is detachable from the main unit for ease of transport
and to avoid damage to the tension rods.
Rates of Strain: 30 fixed speeds between 0.00048 mm/min and 6.00
mm/min.
Suitable for operation on 220 V, 50 Hz, single phase, AC supply.