Geotechnical Engineering Laboratory
Equipment Gallery
Pycnometer Test
Specifications
- Capacity: 1kg
- Material: Complete with brass cone, rubber seal and screwed cap.
Description
Test is performed as per (IS: 2720 – part ꠲). Suitable for determination of specific gravity of sand and fine gravel.
Density Bottle Test
Specifications
- Capacity: 100ml
Description
Test is performed as per (IS: 2720-part ꠰). Suitable for determination of specific gravity of fine clay particles.
Core Cutter Test
Specifications
- Cylindrical core cutter 100mm dia x 130mm long with beveled cutting edge and having wall thickness 3mm.
- Steel dolly 100mm inner dia x 25mm heigh
- Rammer with steel rod.7
Description
Determination of In-situ dry density of soil as per (IS:2720-Part XXIX) It is mainly used in fine grained cohesive soils without stones.
Sand Replacement Test
Specifications
- Sand pouring cylinder 115mm internal dia with conical funnel and shutter
- Calibrating container 100m inner dia and 150mm deep with flange 50mm wide.
- Metal tray 300 square x 40mm deep with a 100mm dia hole at the center.
Description
The apparatus is suitable for field density estimation of fine and medium grained soils, as per (IS: 2720-Part XXVIII)
Mechanical Sieving
Specifications
- As per (IS: 2720-Part IV)
- Maximum of sieve sizes for fine grained 150mm or 200mm dia.
- Suitable for operation on 220 volts, 50 Hz, single phase supply.
Description
Grained size analysis is a basic laboratory test required to identify soils in engineering soil classification system.
Hydrometer Test
Specifications
- The scale on the hydrometer is marked from 0.995 to 1.030 in terms of density gm/ml of suspension at 27꠶c
Description
Test is performed as per (IS: 2720-Part IV). Used for particle size analysis of soil in suspension when it has more than 10% of micron IS sieving passing material.
Casagrande Apparatus
Specifications
- Motor: 120rpm
- Voltas: 220
- 50 Hz, single phase and supplied with a grooving tool as per IS: 2720.
Description
The test is performed as per (IS: 2720-Part V) gives the moisture content at which a soil passes from the plastic the liquid state.
Plastic Limit Test
Specifications
- The moisture content where the thread breaks apart at a diameter of 3.2 mm (about 1/8 inch).
Description
This test is performed as per (IS:2720-Part V) the water content at which a soil-water paste changes from a semisolid to a plastic consistency as it is rolled into a 3.175 mm (1/8 inch) diameter thread in a standard test.
Thermostatic Oven
Specifications
- Maximum temperature of 300 degrees
- Digital display
- 220V, 50Hz and single-phase supply
- Inside Heavy steel duty sheet with four layers
Description
Used to maintain the required temperature to samples
Shrinkage Limit Test
Specifications
- 75mm square prong plate made of 3mm thick acrylic sheet with three metal pronges
- Stainless steel shrinkage dish 45mm dia, 15mm deep.
- Glass cup with ground edge 50mm to 55mm dia,25mm deep.
Description
This test is performed as per (IS: 2720-Part VI) the maximum water content at which a reduction in water content does not cause an appreciable reduction in volume of the soil mass.
Proctor Compaction Test
Specifications
- Diameter of rammer 50mm
- Weight of rammer 2.60kg for light weight compaction and 4.89 kg for heavy compaction
- Height of wall of rammer 310mm and 450mm
- Weird for 220v single phase 50Hz supply
Description
The Automatic soil compactor replace the hand compaction procedure as specified for dry density moisture content relationship of soil. As per (IS: 2720-Part VII &VIII).
Constant And Variable Head Permeability Test
Specifications
- Diameter ranges from the 6mm to 75mm. A 75mm tube is fitted with an overflow pipe.
- Permeability mould 1000ml capacity with detachable collar 50mm high one base plate.
Description
Suitable for both constant head as well as falling head permeability test. The apparatus consists of Universal Permeameter (IS: 2720-Part XVII), IS 11209.
Direct Shear Test
Load Cell: 250kg
- Capacity: 200kg/2000N
- Resolution: 0.1kg/1N
Linear differential transform ER (LVDT) 2 No
- Stroke: + or -20mm
- Resolution: 0.01mm
Software data acquisition from signal conditioning unit to computer
Calculates Area, volume, Bulk density, Dry density, moisture content etc. of the specimen
Description
To determine the shear strength parameters of cohesionless soil. As per (IS: 2720-Part XIII).
Unconfined Compressive Strength Test
Specifications
- Consists of spring-operated load frame with arrangements for loading.
- 38 mm dia X 76 mm long the mould is supplied complete with two 38mm dia x 25 mm long plugs.
- One set of four load spring of stiffness 0.2, 0.4, 0.8 and 1.6 kg/mm.
Description
The Unconfined Compressive Strength test is performed as per (IS 2720-Part X) at controlled rate of strain. Gives the compressive and shearing strength of clayey soil, both in undisturbed and remoulded condition.
Vane Shear Test
Specifications
- The width of vane, from edge of one vane to edge of another vane, is 12±0.15 mm.
- 24±0.25 mm. The thickness of vane is 0.5±0.05 mm.
Description
The vane shear test apparatus consists of a four – blade stainless steel vane attached to a steel rod that will be pushed into the ground. As per (IS: 2720-Part XXX).
Relative Density Test
Specifications
- Vibrating table suitable to work with 440v, 50Hz three phase power supply.
- Vibration deck of size 750mm square.
- Vibrating at a frequency of 3600 vibrations/minute under a115 kg load and amplitude variable from 0.05mm to 0.65 mm
Description
Primarily meant for determination of void ratio of cohesion less soil, free draining soils, in loosest and densest states as per (IS: 2720-Part XIV).
CBR Test
Specifications
- Load frame: 50KN
- CBR mould 150mm base plate and collar inner dia 175 mm height.
- Proving ring 10KN capacity
- Surcharge weights 2.5 kg annular
- Surcharge weight 2.5 kg slotted
- Dail gauge 0.01X 25mm
Description
CBR test is penetration test developed by California stated highway department for evaluating the bearing capacity of sub grade soil for design of flexible pavement. As per (IS: 2720 – Part XVI).
Triaxial Test
Specifications
- Three parts split mould complete with a base mould for collar 50mm dia and 100mm long specimen
- 38 mm dia X 76 mm long specimen and 50 mm dia and 100 mm long specimen
- Set of two porous stones 38/50 mm dia and 6mm thick
- Rubber sheath for 38/50 mm dia (pack of 10).
Description
A triaxial test is performed on a cylindrical core soil or rock sample to determine its shear strength. The triaxial test attempts to replicate the in-situ stresses on the core soil or rock sample. As per (IS: 2720-Part XII).
Three Gang Type Consolidometer Test
Specifications
- Load unit capacity 20kg/cm2
- Consolidation cell height 60mm X 20mm
- Dail gauge 5X 0.002 mm
- Set of weights stress up to 10kg/cm2
Description
Determination of soil compressibility saturated soils. The test performed as per (IS: 2720-Part XV).
Large Scale Direct Shear Test
Specifications
- Direct operation: Motorized
- Rates of Strain (mm/min): 72 speeds ranging from 0.0014 to 10.16mm/min
- Specimen size: 30 x 30 x 15 cm
Description
Large Scale Direct Shear test the shear resistance between a geosynthetic or geosynthetic clay liner (GCL) and the contact surface of a layer soil sample according to test methods in ASTM D5321 and ASTM D6243. The test sample is divided horizontally and mounted in a two-piece shear box assembly. As per (IS: 2720-Part XIII).
Soil Moisture Content Test
Specifications
- Capable of temperature = 300꠶C.
- A balance readable and accurate to 0.01g.
Description
The soil moisture content expressed as the amount of water present in a depth of one meter of soil. As per (IS: 2720-Part II).
Soil Organic Content Test
Specifications
- Thermostat oven
- Moisture content tins
Description
The soil sample is oven dried and then heated to 400°C; at this temperature organic matter is burned off. By measuring the weight lost by the sample the amount of soil organic matter can be estimated. As per (IS: 2720-Part XXII).
Geotechnical Modelling
- Plaxis
Description
DC (direct current) resistivity methods involve injecting a steady state electrical current into the ground and observing the resulting distribution of potentials (voltages) at the surface or within boreholes. As per IS: 15736 (2007).
