Soil Testing Instruments

This Apparatus is used for determination of the dry density of compact, fine, medium grained soils and for layers not exceeding 50 cm thickness. A circular hole is dug into the ground, all the soil from within it collected, weighed and dried, and the hole back-filled with a standard uniform sand or fine gravel, poured from a calibrated container for calculating the volume of hole.
Meets:- IS: 2720 (Part 28)

• Sand Pouring Cylinder Apparatus 100mm Dia.
• Sand Pouring Cylinder Apparatus 150mm Dia.
• Sand Pouring Cylinder Apparatus 200mm Dia.

It consists of Cylindrical Calibration Container, Metal Tray, with central hole
Optional Extra Metal Tray without central hole

The pore pressure measuring apparatus consists of a screw pressure pump, null indicator in Perspex, pressure gauge, mercury manometer, volume change burette and the necessary connecting tubes and valves. It is used for measuring pore water pressure and pore air pressure in soils. It has many features, which simplify the operation. The Null Indicator is made from a transparent Perspex block. It is a simplified U-Tube Null Indicator, in which water can bypass mercury if null indicator is tilted; thus de-airing process by circulation of water is facilitated. All features enable a visual check to be made during the de-airing operation of apparatus. A mercury manometer and a pressure gauge of Bourdon Tube type are provided on the panel on which the whole equipment is mounted. Very small positive or negative pressures are observed on the manometer. A 50 ml burette is clamped to a sliding bracket on one side of the panel. It is used for measuring the volume change in the specimen when subjected to confining pressure in the triaxial cell
The following models of Pore Pressure Apparatus are available:

1. Pore Pressure Apparatus, 1000 kPa (10 kg/cm2) Capacity
The equipment consists of:

• Pressure Gauge, Bourdon Tube Type, Graduation: -1.0 to +10 bar in 0.1 bar division (or -100 to +1,000 kPa in 10 kPa divisions) Dia: 200 mm
• Manometer, Glass U Tube, measures low positive and negative pore pressure and checks zero error of pressure gauge. It is provided with a mercury trap. (Mercury supplied at extra cost)
• Null Indicator, Perspex with mercury trap and cursor to indicate the mercury level
• Burette, 50 ml, for measurement of volume change in the soil specimen
• Pressure Pump, fitted with four Ball Valves
• Copper Coil
• Water Reservoir

Note: All the above parts are fixed on a panel suitable for mounting on the wall.

2. Pore Pressure Apparatus, 2000 kPa (20 kg/cm2) capacity

The Volume Change Gauge illustrated works on the principle of reversing the direction of flow when the limit of the volume change scale is reached. The number of cycles with the volume of fluid handled in each cycle provides the total volume change, whereas the sensitivity is governed by the dia of the polythene tube used.
The sensitive volume change gauge has realized sensitivity of 0.003 ml/mm with the 6 ml volume of fluid per cycle. The apparatus consists of a volume measuring polythene tube running along both sides of a scale and connected at both ends to two mercury traps. These traps are connected to flow reversal valves through a manifold. The length of the polythene tube is enough to measure 6 ml volume of fluid per cycle. A small pallet of mercury is introduced in the circuit to be used as a cursor, and the movement of pallet is measured. The unit is tested to a pressure of 20bar (20 kg/cm2) and is designed for wall mounting.

• " Sieves G.I. 45cm dia up to 2.36 mm
• " Sieves G.I. 30cm dia up to 2.36 mm
• " Sieves Brass 30cm dia up to 75micron
• " Sieves Brass 20cm dia up to 45 micron

Meets:- IS: 2720 (Part 4), ASTM D 422, AASHO T 88, BS: 1377

To make the process of sieving easier and quicker, electrically operated mechanical Sieve Shakers are offered for dry sieving. These Sieve Shakers are popularly used not only in soil laboratories but also in a number of industries where sieving is required; such as for ores, refractory materials, minor aggregates, pigments, powdered coal, soap, cement, roofing materials, plastic moulding powders and pharmaceuticals. The Sieve Shaker can carry up to 7 sieves.

• Sieve Shaker Manual. Hand Operated
• Sieve Shaker motorised Gyratory for 200mm sieves
  It is driven by a ¼ HP motor. The Sieve Table is inclined from the vertical axis and the direction of Inclination changes progressively in the clockwise direction. In addition to the gyratory motion of the table, there is a tapping motion as well.

This is heavy machined driven by a ¼ hp motor 220 Volts single phase 50 Hz. It is exceptionally robust and lasting. The circular and end to end motion is given by hammer from the top. The shaker takes 8" Or 6" sieves. The shaker is recommended for I.S.S tests.

This yoder type motor driven sieve shaker is for carrying out wet sieve analysis of material. Consists of a water reservoir and 1,2 and 3 holders, for holding 7 no. sieve on each holder of 8" dia The shaker is driven by 1/4 HP motor through a belt drive. Works 230 volts. 50 cycles, single phase A.C

It is specially useful for determination of moisture in substance, that quickly reabsorbs moisture after drying. The infrared radiation is controlled by a voltage regulator and thereby provides excellent heat control. The instrument is provided with an indicator lamp. The torsion balance has a built-in magnetic damper to reduce pan vibrations enabling quicker weighing. The balance scale (drum) is divided in terms of moisture percentages on wet weight basis, which are read directly from it. Graduations are from 0 to 100% in 0.2 % divisions, but readings may be estimated to 0.1 % moisture content. It works on 230 V, 50 Hz, Single phase, AC Supply.

• Capacity: 5 g approx.
• Sensitivity: 10 mg approx

Meets:- IS: 2720 (Part 2) - 1973
Optional Extras Infra Red Lamp
Thermometer
Torsion Wire, pack of six

Using a speedy moisture meter, the moisture content of soils, sand and other fine-grained material can be obtained quickly with reasonable accuracy. The test technique is based on the fact that water will react with calcium carbide to form acetylene gas and the quantity of gas formed is directly proportional to the water present, leaving a surplus of the chemical used in the test. The quantity of acetylene gas produced is indicated on a built-in pressure gauge, which is calibrated in percentage of moisture on wet weight basis.
Meets: - IS: 2720 (Part 2) - 1973 IS: 12175-1987

• Speedy Moisture Meter
  Range: 0 - 25%, Accuracy Division: 1%
• Speedy Moisture Meter
  Range: 0 - 50%, Accuracy Division: 1%

Each instrument is supplied complete in a carrying case fitted with counterpoised balance for weighing the sample, Scoop for measuring carbide reagent, a set of steel balls and a cleaning brush.
Extra
Calcium Carbide Reagent, in a container of 500 gm