Best Premium Large Box Direct Shear Test Apparatus VSLIC-S223
short info
Standard
Model
Origin
Make/ OEM
short info
Standard
Model
Origin
Make/ OEM
Vertex Large Box Direct Shear Apparatus test, the failure of the soil sample in shear is caused along a predetermined plane. Test is performed as per IS 2720 part XIII The normal load, strain and shearing force are measured directly during the test. It is also used to estimate residual stress of soil. The direct shear testing apparatus utilizes a square box divided horizontally into two halves. The box containing the sample is placed in a water jacket and subjected to constant normal load while a horizontal force is applied till the specimen fails along the plane of juncture of the two halves. A number of specimens are tested under different loads and from the data obtained the angle of internal friction and shearing strength of the soil can be evaluated. Following pages give details of both hand operated and motorised versions of direct shear test apparatus conforming to different Indian Standard Specifications.
This is required for testing 300 mm x 300 mm x 150 mm soil sample containing gravel with particle size more than 4.75 mm.
Optional
100mm shear box assembly complete with porous stone and gripper plate The unit provides 72 different constant rates of strain for shear load ranging from 0.0014 mm/min. to 10.16 mm/min and is suitable for carrying out residual shear strength test.
The equipment comprises of the following :-
Suitable for operation on 220 V, 50 Hz, single phase supply. Supplied without Proving Ring and dial gauges which are to be ordered separately.
Vertex Large Box Direct Shear Apparatus test, the failure of the soil sample in shear is caused along a predetermined plane. Test is performed as per IS 2720 part XIII The normal load, strain and shearing force are measured directly during the test. It is also used to estimate residual stress of soil. The direct shear testing apparatus utilizes a square box divided horizontally into two halves. The box containing the sample is placed in a water jacket and subjected to constant normal load while a horizontal force is applied till the specimen fails along the plane of juncture of the two halves. A number of specimens are tested under different loads and from the data obtained the angle of internal friction and shearing strength of the soil can be evaluated. Following pages give details of both hand operated and motorised versions of direct shear test apparatus conforming to different Indian Standard Specifications.
This is required for testing 300 mm x 300 mm x 150 mm soil sample containing gravel with particle size more than 4.75 mm.
Optional
100mm shear box assembly complete with porous stone and gripper plate The unit provides 72 different constant rates of strain for shear load ranging from 0.0014 mm/min. to 10.16 mm/min and is suitable for carrying out residual shear strength test.
The equipment comprises of the following :-
Suitable for operation on 220 V, 50 Hz, single phase supply. Supplied without Proving Ring and dial gauges which are to be ordered separately.
Vertex Large Box Direct Shear Apparatus test, the failure of the soil sample in shear is caused along a predetermined plane. Test is performed as per IS 2720 part XIII The normal load, strain and shearing force are measured directly during the test. It is also used to estimate residual stress of soil. The direct shear testing apparatus utilizes a square box divided horizontally into two halves. The box containing the sample is placed in a water jacket and subjected to constant normal load while a horizontal force is applied till the specimen fails along the plane of juncture of the two halves. A number of specimens are tested under different loads and from the data obtained the angle of internal friction and shearing strength of the soil can be evaluated. Following pages give details of both hand operated and motorised versions of direct shear test apparatus conforming to different Indian Standard Specifications.
This is required for testing 300 mm x 300 mm x 150 mm soil sample containing gravel with particle size more than 4.75 mm.
Optional
100mm shear box assembly complete with porous stone and gripper plate The unit provides 72 different constant rates of strain for shear load ranging from 0.0014 mm/min. to 10.16 mm/min and is suitable for carrying out residual shear strength test.
The equipment comprises of the following :-
Suitable for operation on 220 V, 50 Hz, single phase supply. Supplied without Proving Ring and dial gauges which are to be ordered separately.
Shear strength of a soil is its maximum resistance to shearing stresses. The shear strength is expressed as
Where C’ = Effective cohesion
= Effective stress = Effective angle of shearing resistance
Using direct shear test, one can find out the cohesion and angle of internal friction of soil which are useful in many engineering designs such as foundations, retaining walls, etc.
This test can be performed in three different drainage conditions namely unconsolidated-undrained, consolidated-undrained and consolidated-drained conditions. In general, cohesionless soils are tested for direct shear in consolidated drained condition.
Apparatus Required for Direct Shear Test
Apparatus required for conduction direct shear test are
Fig 1: Direct Shear Test Apparatus
Test Procedure of Direct Shear Test
Test Procedure of Direct shear test contains following steps:
Observations and Calculations for Direct Shear Test
Calculations are to be done using the observations taken from the test as follows:
Calculate the shear stress using below tabulated observations:
S.No | Elapsed time | Horizontal dial gauge reading | Horizontal displacement | Vertical dial gauge reading | Vertical displacement | Proving ring reading | Shear force | Shear stress |
Now determine the shear stress at failure for different normal stress values:
Test no. | Normal stress(kN/m2) | Shear Stress at Failure (kN/m2) | Shear Displacement at Failure | Initial Water Content | Final Water Content |
Now plot a graph between normal stress and shear stress by taking normal stress on abscissa and shear stress at failure on ordinate. The graph looks like as shown below.
Fig 5: Graph plotted between Normal Stress and Shear stress
From the graph cohesion intercept (c’) and angle of shearing resistance () can be known and shear strength (s) can be calculated from the formula.
Result of Direct Shear Test
Shear strength of the given soil sample is = ______________ kN/m2.