The Lab CBR Test Apparatus used to determine the relative bearing ratio and expansion characteristics under known surcharge weights of the base, sub-base and sub-grade soils for the design of roads, pavements and runways.
Capacity: 50 KN (5000 kg)
Strain rate: 1.25 mm per minutes
Power: 220 V, Single phase AC supply
CBR Mould with collar & base plate
Penetration piston, 50 mm die with bracket
Perforated brass swell plate with stem & locknut
Displacer block 148 mm die with T-Handle
Annular & slotted metal weight 2.5 kg
Aluminum tripod stand
Rammer 50 mm internal die 2.6 kg & 4.89 kg
Proving ring 10 KN capacity with calibration certificates in teak wooden carrying case
The Direct Shear test apparatus consist of a square or circular box 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 juncture between the box sections of this. 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. The load yoke in these direct shear test apparatus helps counter balance the loading system. The lead screw connected to the shear box housing helps application of shear stress.
Direct Shear Test Apparatus comprises of Direct Shear Box assembly for 60mm x 60mm x 25mm thick specimen, Shear Box Housing, Specimen cutter, Loading Unit with a capacity of 8kg/cm2, set of weights to give normal stress of 3kg/cm2, Proving Ring duly calibrated by Nccbm (Govt) of 2.5kN (250kgf) capacity & 2 (Two) Dial Gauges 0.01mm x 25mm travel. The load yoke with direct and through level system for applying normal load upto 8 kg/cm2 capacity, fixtures for proving ring, brackets for holding consolidation and strain dial gauges are also provided in these direct shear test apparatus.
The Unconfined Compression Test Apparatus for soil includes uniaxial compression test in which the test specimen is provided with no lateral support while undergoing vertical compression. The test measures the unconfined compression strength of a cylinder of cohesive or semi-cohesive soil and indirectly shearing strength. The shearing strength of the soil is generally taken to be one-half of the unconfined compression strength. The unconfined compression test apparatus is used normally on an undisturbed sample with its natural moisture content. It may also be performed on remolded samples to evaluate the consequences of disturbances and remolding.
Unconfined Compression Test Apparatus is normally useful in soil mechanics laboratories. The unconfined compression test is the simplest and quickest method for evaluation of the shear strength of cohesive soil in the laboratory or in the field. The results from compression test apparatus are widely used in ascertaining the relative consistency and sensitivity for estimating the ultimate bearing capacity.
Load Frame 50kN capacity, Electrically cum Manually Operated with 3 rates of strains 1.25mm, 1.50mm, 2.50mm/min – 1No
Split Mould 38mm Dia – 1No
Set of Conning Tools– 1 Set
Set of Conning Plates with Springs – 1 Set
Proving Ring, 2.5kN capacity fitted with dial gauge with the set of loading pads and calibration certificate by NCCBM (Govt Testing Lab) in a nice wooden carrying case.
Dial gauge 0.01mm x 25mm travel
The Machine is fitted with ¼ HP Motor. Suitable for Operation on 220V, Single Phase, 50Hz, AC Supply.