;)
Information of shear values plays an important role in the design of sub structures in determining bearing capacity of soils, design of retaining walls, instability calculation of earth slopes etc. various share apparatus are available and Direct shear Apparatus is one of them. In direct shear test specimen contained in a box is subjected to a constant normal load and increasing horizontal load are directly measured
DIRECT SHEAR APPARTUS (HAND OPERATED)
IS: 2720 (Part-VIII), ASTM D 3080.
For determinant the direct shear strength of soils on specimen size 60mm x 60mm x 25mm.
Specification:
The apparatus comprises of the following.
Loading Unit :
Supplied with load yoke with direct and lever system for applying load. Normal stress capacity 8kg/sq.cm. load is applied either directly or through a counter balanced detachable lever. Provision is made for the load to be applied either through a steel ball recessed in the loading pad or direct through a boss on the pre collaborated loading yoke. The loading unit is provided with V strips and roller strips for frictionless movement of shear box housing.
Shear Box Assembly:
Comprising Direct Shear box in two halves for a square specimen size 60 x 60 x 25mm one pair of plain gripper plates, one pair of perforated gripper plates, one pair of porous stones, one top loading pad. Shear box housing: Accommodates the Direct shear Box assembly. Complete with two ball roller strips.
Specimen Cutter:
For cutting 60 x 60 x 25mm specimen form larger samples. Set of weights to give a normal stress of 3kg/sq.cm. through lever
Complete set as above but without proving ring.
Essential Accessories :
High sensitivity compression proving ring cap 2kN, One consolidation dial gauge 0.01 mm x 25mm and one strain dial gauge 0.01mm x 25mm
Optional extras : Additional set of weights to give a normal stress of 5kg/cm2 Soil Sampler for 60mm x 60mm specimen and test forms pad of 50.
Spares :
Porous stone for 60mm x 60mm size sample available in pairs.