Soil

Plate Bearing Test is essentially a model test of foundations. It gives the load deformation characteristics

Ref. Stand ASTM D1558 Compaction control in the field is exercised by determining the moisture content & dry density. Quick evaluation of this is done by developing curves in the laboratory, showing the relationship between moisture content versus dry density & penetration.

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.

It is designed to determine the swelling pressure developed by soil specimens moulded to desired densities at known moisture contents, when soaked in water. The load applied to restrain the swelling is transferred on to a load measuring proving ring through a perforated swell plate and a load transfer bar. The proving ring is attached to the lead screw of hand operated load frame. A soaking tank is provided for saturating the specimen and the base of the mould provided has channels and radial grooves with connecting holes.

Ref Std : IS 2720 (Part 7 & 8) Invariably in every soil laboratory, compaction and penetration tests on soils are carried out regularly. The electrically operated mechanical compaction process eliminates the tedious hand compaction process and results in a considerable saving of time. Two rammers with two different stroke lengths are provided. This makes the apparatus suitable to carry out all the normal compaction operations required in soil testing laboratories including the CBR tests This is a new design motor driven mechanical compactor, useful for soil compaction in 100 mm or 150 mm dia moulds. The rammer travels across the mould and the table rotates the mould in equal steps on a stable base. The number of blows per layer can be set at the beginning of the test. Rammer - circular faced 50mm dia adjustable to 2.6kg or 4.9kg weight. Drop - Adjustable to 310mm or 450mm.

Ref Std : IS 2720 (Part 17), IS:11209 Permeability is a property of soil which permits flow of water through its interconnecting voids. Permeability is an important engineering property which governs the rate of settlement of saturated compressible soil layers and the rate of flow of aquifer. Permeability is taken into account for pumping ground water, spacing well points for de-watering foundation sites for excavation, retention of water in reservoirs, design of dams and selection of soils to be used for various zones of embankments of dams and reservoirs. There are two types of Permeameters, namely Constant Head Permeameter and Falling Head Permeameter. Falling Head Permeameters are used for testing remoulded or undisturbed fine grained soil having less than 10-2 cm/sec coefficient of permeability and Constant Head Permeameters are used for coarse grained cohesion less soils. It is a laboratory model used for testing soil with coefficient of permeability in the range of 10-3 to 10-7 cm/sec and maximum particle size of 10mm.

Ref Std : IS 2720 (Part XIV) Relative Density relates the dry density of chesionless soil to maximum and minimum densities. The degree of compaction of cohesionless soil can be treated in terms of relative density measured through this equipment.

Ref. Stnd.: IS 2720 (Part-30) This apparatus is designed for conducting in-situ Vane hear test from the bottom of bore hole in saturated cohesive deposits, for determining their in-place shearing resistance. The equipment consists of a torque applicator assembly mounted on a base. A gear wheel, which is marked in degrees, holds a torque ring and is geared to a crank. The torque ring has a section cut from it and deforms as torque is applied and the resultant deformation is indicated by a dial gauge. A pointer is provided for registering the rotation of the vane. A detachable stand is provided to anchor the instrument. An attachment to securely hold the string of rods is provided. A calibration curve to convert the dial gauge readings to kg-cm of torque is also supplied.

Designed for use with Trixial Cells,specifically for continous measurement of Volume change during the test.

The Pore Pressure Apparatus manufactured by Aimil is designed according to the principles outlined in the book. “The Measurement of Soil Properties in the Triaxial Test” by A.W. Bishop and D.J. Henkel. This 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 50ml burette is clamped to a sliding bracket on one side of the panel. It is used for measuring

Load Frames are Loading devices employed for application of compression and penetration loads required for various tests, such as Unconfined Compression Test, Triaxial Shear Test, California Bearing Ratio Test etc. The load application is effected by advancement of a lead screw secured against rotation by a sliding key and is measured with a Proving ring or Load Cell. Aimil manufactures a wide variety of Electro Mechanical to Microprocessor Load Frames with different designs of frame structure, modes of operation (manual or electrically driven), loading capacities, speeds of travel, so that appropriate selection is possible to meet the requirements of standard methods used for various tests to cover different soil types and sizes of specimens. Ordering Information : AIM 062-1 Load Frame, Motorised Three Speed, 50 kN AIM 064 Load Frame, Motorised, 30 speeds, 50 kN AIM 064-E Load Frame, Motorised, 50 kN Microprocessor Based AIM 065 Load Frame, Motorised, 12 speeds,200 kN AIM 066 Load Frame, Motorised, 12 speeds,500 kN

Ref Stds : IS 2720 (Part15), IS 12287, BS 1377, ASTM D 2435 Consolidation of clay deposit leads to distress in buildings such as cracks and failures. Consolidation is reduction of volume of soil due to expulsion of water from its pore space caused by sustained loading. This phenomenon is time dependent. The one dimensional consolidation test performed on an undisturbed sample of clay is useful for understanding the history of the soil deposit. The test results can be used for calculating the settlement of structures built on clayey soil. We offer single gang & three gang Analog & electronic Models. We have new bench models also. StarDaq & software for conducting the consolidation test an also be provided if required of extra cost

Ref Stds : IS 2720 (Part15), IS 12287, BS 1377, ASTM D 2435 Consolidation of clay deposit leads to distress in buildings such as cracks and failures. Consolidation is reduction of volume of soil due to expulsion of water from its pore space caused by sustained loading. This phenomenon is time dependent. The one dimensional consolidation test performed on an undisturbed sample of clay is useful for understanding the history of the soil deposit. The test results can be used for calculating the settlement of structures built on clayey soil. We offer single gang & three gang Analog & electronic Models. We have new bench models also. StarDaq & software for conducting the consolidation test an also be provided if required of extra cost.

Ref Stds : IS 2720 (Part 13) The Direct Shear test is carried out with an apparatus consisting of a square divided into two halves. The specimen, contained in the box, is subjected to a constant normal load while an increasing horizontal force is applied to one of the sections of the shear box. This force causes a shear failure along the junction between the box sections. The shear force and the normal load are measured directly. The rate of strain is adjusted by the speed of the horizontal force applied. The loading unit has V-strips on which the shear box housing rests. Suitable for specimens of size 60×60×25mm. Direct Shear Apparatus supplied by AIMIL include AIM 104 Direct Shear apparatus, 2kN, AIM 105 Direct Shear Test Apparatus, Electronic, 2kN, AIM 105-1 Direct Shear Outfit, Electronic, 2kN, complete with Aimil \\\'Star DAQ\\\' System., AIM 105-2 Direct Shear Outfit, 2kN, with Microprocessor loading unit, Electronic & AIM 106 Large Direct Shear Apparatus, Motorised, 50kN

Ref Std : IS 9669, IS 2720 (Part 16) The California Bearing Ratio test, (usually called CBR test) is an empirical test developed in California, USA for determining the Relative Bearing Ratio and expansion characteristics under known surcharge weight of base, sub-base and sub grade soils for the design of roads, pavements and runways. The CBR test is used extensively in selection of materials and control of subgrades. The test can be performed in the laboratory on prepared samples or in-situ on location. It is important to appreciate that this test, being of an empirical in nature, is valid only for the application for which it was developed i.e., the design of highway base thickness. Salient Features : • Compact, bench top design • Rapid Platen Adjustment • Complete with stabilizing bar • Options for mechanical or electronic measurement Suitable for operation on 220V, 50Hz, single phase, AC supply.

To make the process of sieving easier and quicker, electrically operated mechanical Sieve Shakers are offered for dry sieving. The mechanical Sieve Shakers effect a more elaborate and standardised sieving action to produce accurate results and eliminate personal errors involved in manual sieving. On the basis of experience gained in the production of these sieve shakers for more than thirty years, considerable improvement has been made in the design and performance of these units. 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 new design is compact and light weight and can be mounted on a bench top. This eliminates the use of concrete foundation. Noise has been reduced considerably in the new model. A digital timer adjustable from 0-99 minutes is incorporated as an integral part of the equipment. The Sieve Shaker can carry upto 8 sieves of 20cm dia. It is driven by a ¼ HP geared 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. Suitable for operation on 220 V, 50 Hz, Single Phase, AC supply.

Ref Std : IS 460 Sieve Brass Frame 20cm dia Sieves G. I. Frame 30cm dia Sieves G. I. Frame 45cm dia The analysis of soil by particle size provides a useful engineering classification system from which a considerable amount of empirical data can be obtained AIMIL supplies both in GI and Brass Frames of 20cm, 30 & 45 Cm diameters

Ref Std : IS 2720 (Part 2) This moisture meter has been designed for rapid and accurate determination of the moisture content of a wide variety of materials. It is torsion wire instruments, the torque being applied to one end of the wire be means of a calibrated drum to balance the loss of weight as the test sample dries under infrared radiation. The speed of drying (about 30 min)

Ref Std : IS 2720 (Part 2), IS 12175 Using a speedy moisture meter, the moisture content of soil, 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. A conversion formula gives the corresponding moisture content based on dry weight.