CBR Test Appratus

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CBR Test Appratus Specification

Voltage
230 V

Automation Grade
Manual

Core Components
Load Frame, Penetration Piston, Dial Gauge, Mould, Proving Ring

Capacity
50 kN

Measurement Range
0 - 50 kN

Feature
Highly Efficient

Power Source
Electric

Model No
CBR-50

Accuracy
100 %

Temperature Range
Ambient

Frequency
50 Hz

Equipment Materials
Mild Steel, Stainless Steel

Type
Soil Testing Equipment

Usage
Laboratory

Dimension (L*W*H)
725 mm x 525 mm x 820 mm

Weight
Approximately 65 kg

About CBR Test Appratus

CBR Test Appratus

The California Bearing Ratio test, (usually called CBR test) is an empirical test developed in California, USA for determining the Relative Bearing Ratio and expansion characteristics under known surcharge weight of base, sub-base and sub grade soils for the design of roads, pavements and runways. The CBR test is used extensively in selection of materials and control of subgrades.

The test can be performed in the laboratory on prepared samples or in-situ on location. It is important to appreciate that this test, being of an empirical in nature, is valid only for the application for which it was developed i.e., the design of highway base thickness.

Salient Features :

Compact, bench top design

Rapid Platen Adjustment

Complete with stabilizing bar

Options for mechanical or electronic measurement Suitable for operation on 220V, 50Hz, single phase, AC supply.

Precision Engineering for Reliable Soil Testing

This CBR Test Apparatus incorporates a robust load frame, high-sensitivity dial gauge (least count 0.01 mm), and a proven 50 kN capacity. Each critical componentfrom the penetration piston to the mouldis expertly crafted for consistent, high-accuracy results. Its design ensures repeatable and dependable soil strength measurements for both research and construction projects.

User-Friendly Features and Efficient Operation

The device supports manual operation so technicians can directly control the 1.25 mm/min loading rate, ensuring compliance with testing standards. The powder coated structure resists corrosion, while a compact footprint fits easily within laboratory settings. Motorized drive (0.25 HP) ensures smooth operation, and the electric power source makes setup straightforward, even in high-humidity environments.

FAQs of CBR Test Appratus :

Q: How is the CBR Test Apparatus used in soil testing applications?

A: The CBR Test Apparatus is employed to evaluate the bearing capacity of soil samples in laboratory conditions. By loading the soil at a controlled rate of 1.25 mm/min and measuring penetration up to 25 mm, engineers determine the California Bearing Ratio (CBR), critical for pavement and foundation design.

Q: What standards and specifications does the apparatus meet?

A: This equipment fully conforms to IS 2720 (Part 16) requirements, and features a 50 kN proving ring, 150 mm diameter by 175 mm height mould, and a precise dial gauge with 0.01 mm least count, ensuring measurements align with industry standards for accuracy and reliability.

Q: When should laboratory technicians use this apparatus?

A: The CBR Test Apparatus is recommended whenever soil strength analysis is required, particularly for road, pavement, and foundation projects. Its high efficiency and accurate measurements make it ideal during preliminary engineering investigations or quality assurance in civil construction.

Q: Where can this equipment be deployed for optimal results?

A: The apparatus is optimized for laboratory use due to its precise controls, electric operation (230 V, 50 Hz), and tolerance for ambient humidity up to 90%%. Its moderate weight and compact dimensions allow easy placement in various soil testing labs across India.

Q: What is the process for operating the CBR Test Apparatus?

A: Operation involves placing the soil sample in the mould, initiating the motor-driven loading at 1.25 mm/min, and monitoring penetration with the dial gauge. The manual controls and real-time measurement capabilities enable accurate data collection throughout the test.

Q: What are the main benefits of using this model for soil analysis?

A: Users benefit from its 100%% accuracy rating, robust construction (mild and stainless steel), and user-friendly manual controls. The powder coated finish ensures longevity, while its compliance with IS standards guarantees dependability for professional laboratory testing.

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