Direct Shear Apparatus

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Direct Shear Apparatus Specification

Power Source
Electric (Motorized) / Manual

Voltage
220-240 V AC

Automation Grade
Semi-Automatic

Core Components
Shear Box Assembly, Loading Unit, Dial Gauges

Frequency
50 Hz

Temperature Range
Ambient

Measurement Range
0 12 mm (horizontal displacement)

Accuracy
100 %

Model No
DSA-01

Feature
Highly Efficient

Capacity
2 kN (200 kg)

Equipment Materials
Mild Steel with SS accessories

Type
Mechanical, Bench Type

Usage
Laboratory

Display Type
Analog/Dial Gauge

Dimension (L*W*H)
450 mm x 250 mm x 300 mm (approx.)

Weight
Approx. 40 kg

About Direct Shear Apparatus

Direct Shear Apparatus

For determination of the direct shear strength of soils on specimen size 60 mm x 60 mm x 25 mm.

Specifications

The apparatus comprises of the following:Loading Unit:Supplied with load yoke with direct and lever system for applying load. Normal stress capacity 8 kg/sq.cm. Load is applied either directly or through a counter balanced detachable lever. Provision is madefor the load to be applied either through a steel ball recessed in the loading pad or direct through a boss on the pre calibrated 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 25 mm 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 25 mm specimen from larger samples.Set of weights to give a normal stress of 3 kg/sq.cm. through lever as follows:To give Kg/sq.cm. Qty. 0.05 4 Nos. 0.1 1 Nos. 0.2 1 Nos. 0.5 3 Nos. 1.0 1 Nos.Complete set as above but without proving ring.

Salient Features Essential Accessories

High sensitivity compression proving ring cap 200 kg One Consolidation dia gauge 0.01 mm x 25 mm and one strain dial gauage 0.01 mm x 25 mm and one strain dial gaine 0.01mm x 25 mm.

Optional Extras

Additional set of weights to give a normal stress of 5 kg/cm2. Soil Sampler for 60 mm x 60 mm specimen and test form pad of 50. Spares: Porous stone for 60 mm x 60 mm size sample available in pairs.

Robust and Precise Engineering

Crafted from powder-coated mild steel with stainless steel accessories, the Direct Shear Apparatus ensures lasting performance in demanding laboratory settings. The included shear box assembly and high-precision dial gauges with 0.01 mm resolution enable highly accurate shear and displacement measurements, supporting research and practical soil testing applications.

Versatile Adjustment and Capacity

The apparatus offers an adjustable loading rate (0.02-2.0 mm/min) and can sustain maximum shear loads up to 2 kN (200 kg), making it suitable for a wide range of soil samples. It features both motorized and manual operation, delivering flexibility for various testing protocols and operator preferences.

User-Friendly Operation and Complete Accessories

Designed with laboratory efficiency in mind, this semi-automatic unit comes with essential accessories like proving ring, counter balance weights, and spacers. Its analog/dial gauge display ensures easy monitoring, while the bench-type design fits seamlessly on standard laboratory tables, simplifying installation and use.

FAQs of Direct Shear Apparatus:

Q: How is the loading rate adjusted on the Direct Shear Apparatus DSA-01?

A: The loading rate on the DSA-01 can be precisely adjusted between 0.02 and 2.0 mm/min, allowing users to tailor the test based on soil type and laboratory protocols. This is managed either manually or through the motorized option, ensuring controlled and repeatable shear tests.

Q: What types of soils can be tested using this apparatus?

A: The apparatus is suitable for a broad range of soil samples, especially cohesive and granular soils. The 60 mm x 60 mm x 25 mm shear box accommodates standard test specimens, making it applicable for civil engineering, academic research, and quality control laboratories.

Q: When should the counter balance weights be used during testing?

A: Counter balance weights are provided to offset the weight of the shear box and other components, ensuring that only the applied shearing force is measured. Use them at the start of each test setup to achieve accurate and unbiased shear measurements.

Q: Where is this Direct Shear Apparatus manufactured and supplied?

A: This model is manufactured, exported, and supplied by leading Indian laboratory equipment providers, making it readily available for institutions across India and overseas seeking reliable soil testing solutions.

Q: What is the process for measuring shear force and displacement?

A: During testing, force is applied to the soil specimen in the shear box, and the dial gauge (least count 0.01 mm) measures the resulting horizontal displacement. The proving ring records the applied shear force, ensuring comprehensive data for soil analysis.

Q: What are the operational temperature and electrical requirements?

A: The apparatus operates efficiently in ambient lab conditions between +5C to +40C and requires a 220-240 V AC power supply (50 Hz) for motorized operation. Manual operation does not require power, offering flexibility in various laboratory environments.

Q: How does using this apparatus benefit laboratory testing?

A: Utilizing this direct shear apparatus ensures highly efficient and accurate soil shear strength assessments, supporting dependable research and engineering analyses. Its durable build, precise measurements, and complete accessory package contribute to streamlined lab workflows and reliable results.

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