Field CBR Test Apparatus

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Field CBR Test Apparatus Specification

Capacity
10 kN (1000 kg) manually operated jack with integral pressure gauge

Accuracy
100 %

Feature
Highly Efficient

Temperature Range
Ambient

Measurement Range
0-10 kN

Core Components
Plunger, Dial Gauge, Annular and Slotted Weights, Metal Penetration Piston, Loading Jack

Power Source
Manual

Automation Grade
Manual

Model No
Field CBR Apparatus

Equipment Materials
Mild Steel with corrosion resistant finish

Type
Field CBR Test Apparatus

Usage
Laboratory

Display Type
Analog Pressure Gauge

Dimension (L*W*H)
550 mm x 350 mm x 300 mm (approx.)

Weight
Approx. 45 kg (complete set)

About Field CBR Test Apparatus

Field CBR Test Apparatus

U-bracket and swivel head. Penetration piston, 50mm dia threaded at the upper end.Extension rods set consisting of lengths 5cm, 2 lengths 10cm, 1length 30cm, 1 length 50cm, and 1 length 100cm, used as spacers between the proving ring and penetration piston. The lengths are machined from steel tubing. Connector set, has eight connectors for coupling the penetration piston and proving ring assembly either directly or through extension pieces. Dial gauge support of seamless pipe construction. It stands 30cm high and 45cm wide at the base. Provided with a quick release screw type clamp capable of sliding and locking anywhere along 2 meter length of the bridge. Supplied with annular metal weight 5 kg, 250mm dia with 53mm dia central hole, slotted metal weight 5 kg, 215 mm to 250 mm dia with 53mm dia slot, 2 Nos, Slotted metal weight 10 kg 215mm to 250mm dia with 53mm dia slot 2 Nos. Accessories :-Dial gauge 0.01mm x 25mm travelHigh sensitivity proving ring, cap 5000 kg in a nice case our own calibration.

Precision and Compliance

Designed and manufactured in adherence to IS 2720 (Part 31) and ASTM D1883, the Field CBR Test Apparatus ensures accurate, standardized testing of soil subgrades. Its analog pressure gauge and high-accuracy measurements make it indispensable for geotechnical laboratories.

Robust Build and Versatility

With core components like a mild steel plunger, annular/slotted weights, and an integrated manual jack, this apparatus combines durability with flexibility. Adjustable support surfaces and gauge holder allow for easy configuration, while its portable size suits varied lab setups.

FAQs of Field CBR Test Apparatus:

Q: How is the Field CBR Test Apparatus used in soil evaluation?

A: This apparatus is utilized to determine the California Bearing Ratio (CBR) of soil samples, assessing their suitability for road and pavement foundations. The test measures penetration resistance using a plunger, weights, and analog pressure gauge, following manual operation guidelines.

Q: What standards does the Field CBR Test Apparatus adhere to?

A: The apparatus fully complies with the IS 2720 (Part 31) and ASTM D1883 test method standards, ensuring reliable and internationally recognized results for geotechnical investigations.

Q: Which components are included in the complete Field CBR Test Apparatus set?

A: The complete set comprises a plunger (50 mm diameter), a cylindrical mould (150 mm x 175 mm), annular and slotted weight sets (each 5 kg), a loading jack with a manual integral pressure gauge, a dial gauge, adjustable gauge holder, tripod or detachable frame, and all necessary connecting accessories.

Q: Where is the Field CBR Test Apparatus typically operated?

A: This apparatus is primarily intended for laboratory use, though its portable design and manual operation allow for field testing when consistent surface support and ambient temperature (5C50C) conditions are met.

Q: What is the measurement accuracy and least count of the dial gauge?

A: The dial gauge offers a range of 0 to 25 mm with a least count of 0.01 mm, ensuring precise penetration measurements during each test cycle.

Q: How does the manual loading jack function during the CBR test?

A: The manual jack, with a 10 kN (1000 kg) capacity and ~130 mm stroke, applies load to the plunger. The integral analog pressure gauge records the applied force, allowing operators to monitor and control penetration resistance according to test standards.

Q: What are the operational benefits of using the Field CBR Test Apparatus?

A: Offering high efficiency, repeatable accuracy, and compliance with global standards, this apparatus provides reliable soil strength data essential for road engineering. Its robust, corrosion-resistant build ensures longevity even under frequent laboratory use.

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