California Bearing Ratio Apparatus

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California Bearing Ratio Apparatus Specification

Core Components
Load frame, Penetration plunger, Dial gauge, Cutting collar, Spacer disc

Capacity
5000 kg (typical for laboratory use)

Power Source
Manually operated / Electric motor attachment (optional)

Feature
Highly Efficient

Voltage
220 V (if with electric motor)

Temperature Range
Ambient laboratory conditions

Frequency
50 Hz (if supplied with electric motor)

Measurement Range
0 to 12.5 mm penetration, 05000 kg load

Automation Grade
Manual or Semi-automatic

Accuracy
100 %

Model No
CBR-01 (Example reference)

Equipment Materials
Mild steel frame, Stainless steel rod, Brass/metallic plunger

Type
Mechanical, Adjustable Load Frame

Usage
Laboratory

Display Type
Analog dial gauge

Dimension (L*W*H)
Approx. 660 mm x 560 mm x 1067 mm

Weight
Approx. 90 kg (depending on configuration)

About California Bearing Ratio Apparatus

California Bearing Ratio Apparatus

The equipment consists one each of the following : Load frame, hand operated , capacity 5000 kg. With high and low rates of travel of the lead screw. Mould made from gun metal/brass, 150mm internal dia x 175mm high, with perforated base plate and extension collar 50mm high. Penetration piston, face dia 50mm with adjustable bracket for penetration dial gauge. Circular metal space disc, 148mm dia x 47.7mm high. With detachable handle. Annular metal weight, 2.5 kg. 147 mm dia with 53 mm dia central hole. Slotted metal weight, 2.5kg. 147mm dia with 53 dia slot. Perforated plate made of gun-metal/brass 148mm dia with adjustable stem and lock nut and a metal tripod for dial gauge. Cutting collar, Rammer 2.6kg weight with drop of 310mm. Rammer 4.89 kg. with drop of 450mm.Supplied with proving ring and dial gauge.

Precision Engineering for Reliable Soil Strength Testing

Constructed from high-quality mild steel, stainless steel rods, and brass, the CBR Apparatus is built for accuracy and longevity. Its analog dial gauge offers high-resolution readings up to 0.01 mm, while the load frame supports penetration loads of up to 5000 kg. Customizable proving rings provide flexibility for specialized testing needs.

Ease of Use and Versatile Operation

The apparatus is suitable for laboratories in academic, research, or field settings. Its manually adjustable load frame and optional electric motor enable rapid setup and operation. Measuring penetration up to 12.5 mm, this equipment supports both manual and semi-automatic testing procedures, ensuring ease of use for a variety of users.

Standards-Compliant and Globally Trusted

Meeting IS:2720 (Part XVI), ASTM D1883, and BS 1377 standards, the CBR Apparatus is trusted by geotechnical professionals and institutions worldwide. Exported, manufactured, and supplied across India, it offers assured quality and compliance for civil engineering projects.

FAQs of California Bearing Ratio Apparatus:

Q: How is the California Bearing Ratio test performed using this apparatus?

A: The CBR test involves compacting soil samples in the provided mould, applying a penetration plunger at a controlled speed of 1.25 mm/min, and recording the resistance using the analog dial gauge and proving ring. Measurements help assess the subgrade strength for road construction.

Q: What materials are used in constructing the CBR Apparatus?

A: The apparatus features a durable mild steel frame, stainless steel rods, and a brass or metallic penetration plunger, ensuring longevity and precise measurement under laboratory conditions.

Q: When should the optional electric motor attachment be used?

A: The electric motor attachment can be utilized for increased operational convenience in high-throughput laboratories or when consistent loading speed and minimal manual intervention are required. It operates at 50 Hz with a voltage of 220 V.

Q: Where is this CBR Apparatus typically utilized?

A: This device is widely used in soil mechanics laboratories, research institutions, civil engineering departments, and construction material testing facilities to determine soil bearing capacity.

Q: What is the benefit of using a mechanical analog dial gauge in this apparatus?

A: The analog dial gauge provides immediate and accurate penetration readings with a least count of 0.01 mm, facilitating precise data collection during testing without reliance on digital systems.

Q: What is the process of preparing a sample for the CBR test?

A: A soil sample is compacted in the mould with the provided spacer disc and cutting collar. After preparation, the plunger is applied, and the load penetration is measured as per IS:2720 standards.

Q: How does compliance with IS:2720, ASTM D1883, and BS 1377 add value to this equipment?

A: Compliance ensures the apparatus meets globally recognized quality benchmarks, providing reliable and universally accepted test results for construction and road engineering applications.

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