STANDARD: ASTM D3080, BS 1377:7, AASHTO T236 NF P094071-1/2

Single Direct Shear Testing Machine is to determine the shearing strength of the soil using
the direct shear
apparatus. In many engineering problems such as design of foundation, retaining walls, slab
bridges, pipes, sheet
piling, the value of the angle of internal friction and cohesion of the soil involved are
required for the design.
Direct shear test is used to predict these parameters quickly. The laboratory report cover
the laboratory
procedures for determining these values for cohesionless soils.
Strain controlled direct shear machine consists of shear box, soil container, loading unit,
proving ring, dial gauge
to measure shear deformation and volume changes. A two piece square shear box is one
type of soil container
used.A proving ring is used to indicate the shear load taken by the soil initiated in the
shearing plane.