Rock
Aggregate
Cement
Concrete
Soil
Steel
Bitumen/Asphalt
Security Survey Equipment
General Items
CALIFORNIA BEARING RATIO APPARATUS (BS VERSION MOULD) AZA0911
The AZA0911 California Bearing Ratio (CBR) Apparatus – BS Version Mould from Azalab is a laboratory-grade testing system designed to determine the bearing capacity and strength of subgrade soils used in pavement, highway, runway, and foundation construction. The CBR test is a globally recognized method for soil strength classification and is especially critical for road and pavement design.
This apparatus is manufactured in accordance with BS 1377, featuring a British Standard mould configuration that ensures accurate, repeatable, and internationally acceptable test results. The AZA0911 evaluates soil resistance to penetration under controlled compaction and loading conditions, closely simulating field performance.
Description
Applications
The AZA0911 CBR Apparatus is widely used for:
-
Road and pavement foundation design
-
Subgrade and base course strength evaluation
-
Airport runway and heavy-duty pavement studies
-
Soil compaction quality control
-
Research, teaching, and training in geotechnical laboratories
The test determines the CBR value, which represents the percentage resistance of the soil compared to a standard crushed stone, forming the basis for pavement thickness design.
Construction & Features
The BS version mould assembly is designed strictly as per British Standard specifications.
BS Standard Mould Construction:
-
Internal diameter: 152 mm
-
Height: 178 mm (with collar)
-
Detachable base plate
-
Removable extension collar
Standard Supply Includes:
-
BS-standard CBR mould with base plate and collar
-
Penetration piston (50 mm diameter)
-
Dial gauge or optional digital displacement indicator
-
Annular and slotted surcharge weights
-
Spacer disc and perforated plate
-
Optional soaking tank for soaked CBR testing
-
Compatible with manual or motorised loading frames
All components are manufactured from corrosion-resistant mild steel or cast iron, ensuring dimensional stability, long service life, and consistent testing accuracy.
Standards & Compliance
The AZA0911 apparatus complies with the following standards:
-
BS 1377 (Part 4) – Methods of Test for Soils for Civil Engineering Purposes
-
ASTM D1883 – CBR of Laboratory-Compacted Soils
-
IS 2720 (Part 16) – Laboratory Determination of CBR
This allows the apparatus to be used confidently across international projects requiring BS, ASTM, or IS compliance.
Key Benefits
-
Accurate determination of subgrade soil bearing strength
-
Fully compliant with British Standard CBR requirements
-
Suitable for soaked and unsoaked testing methods
-
Compatible with manual and motorised loading frames
-
Rugged laboratory construction for repeatable results
Specifications
| Feature | Specification |
|---|---|
| Model | AZA0911 |
| Product Type | CBR Apparatus – BS Version Mould |
| Mould Internal Diameter | 152 mm (BS Standard) |
| Mould Height | 178 mm (with collar) |
| Mould Material | Mild Steel / Cast Iron |
| Penetration Piston Diameter | 50 mm |
| Penetration Measurement | Dial Gauge / Digital (0.01 mm resolution) |
| Loading Frame Capacity | 50 kN or 100 kN (manual or motorised) |
| Surcharge Weights | Annular / Slotted – 2.5 kg & 5 kg |
| Testing Type | Soaked and Unsoaked CBR |
| Standards Compliance | BS 1377, ASTM D1883, IS 2720 (Part 16) |
| Application | Laboratory soil testing for CBR |
Frequently Asked Questions (FAQ)
Q1: What is the function of a CBR apparatus?
It measures the bearing capacity of soil by evaluating its resistance to penetration under standardized loading conditions.
Q2: Why use the BS version mould?
The BS version is required for projects and laboratories that follow BS 1377 procedures, particularly in UK-based and international infrastructure projects.
Q3: Can both soaked and unsoaked tests be performed?
Yes. With the addition of a soaking tank, soaked CBR tests can be carried out to simulate worst-case moisture conditions.
Q4: What loading frames are compatible?
Both hand-operated and motorised loading frames with 50–100 kN capacity are suitable.
Q5: Is this apparatus suitable for field testing?
No. AZA0911 is designed exclusively for controlled laboratory environments.
Additional information
| Mould Diameter |
152 mm (BS Standard) |
|---|---|
| Mould Height |
178 mm (with collar) |
| Material |
Mild Steel / Cast Iron |
| Loading Frame Capacity |
50 kN or 100 kN (Manual/Motorized) |
You may also like…
Advanced Triaxial Test System (UU–CU–CD Capable) (AZA 1296)
- UU–CU–CD test modes for complete soil strength profiling
- Automated control of pressure, load, and drainage
- Compatible with clay, silt, sand, and mixed soils
- Integrated data acquisition and real-time graphing
- Meets ASTM D2850, D4767, BS1377, AASHTO standards
- Ideal for geotechnical, research, and academic use
Air Bag Trainer AZA1246
The AZA1246 AZALAB Air Bag Trainer is a comprehensive educational training platform designed to demonstrate the structure, operation, diagnostics, and fault analysis of modern automotive airbag systems, also known as Supplemental Restraint Systems (SRS). Built using OEM automotive components, this trainer delivers a realistic learning experience while maintaining complete operational safety.
This system is ideally suited for automotive engineering colleges, ITIs, polytechnic institutes, vocational training centers, and service technician programs, enabling both theoretical instruction and hands-on diagnostics practice.
Alternator Trainer AZA1247
The AZA1247 AZALAB Alternator Trainer is a hands-on automotive electrical training system designed to demonstrate the working principles, construction, and diagnostics of an automotive alternator with external voltage regulation. Built using OEM automotive components, this trainer provides a realistic and safe learning platform for students, technicians, and trainees to understand vehicle charging systems in depth.
This system is ideal for automotive engineering institutes, ITIs, polytechnics, vocational training centers, and service technician programs, supporting both theoretical instruction and practical experimentation.
Arc Welding Machine AZA1234
The AZA1234 Arc Welding Machine by A Z A Lab is a high-performance industrial welding solution engineered for demanding fabrication, maintenance, and structural welding applications. Designed using advanced inverter technology, this machine delivers superior arc stability, high efficiency, and reliable welding performance across a wide range of electrode types and materials.
With an inverter frequency of up to 20 kHz, the AZA1234 ensures fast dynamic response, reduced spatter, and excellent weld bead appearance. Its robust electrical design supports a high duty cycle, allowing continuous operation under heavy loads while maintaining consistent welding output—even with output cable lengths of up to 100 meters.
AutoDist‑86 Glass Distillation AZA1282
AutoDist-86 Glass Distillation Unit – AZA1282
The AutoDist-86 Glass Distillation Unit (Model: AZA1282) from AZA Lab is a high-performance laboratory water distiller engineered for the consistent production of ultra-pure distilled water. Manufactured entirely from high-grade borosilicate 3.3 glass, this unit delivers exceptional chemical resistance, thermal stability, and long-term durability, making it ideal for scientific, medical, pharmaceutical, and academic laboratories.
Designed for reliability and purity, the AZA1282 ensures contamination-free distillation without the risk of metallic ion leaching common in metal-bodied stills.
AutoFlash – Automated Abel Flash Point Analyzer AZA1277
The AutoFlash-1277 (Model: AZA1277) from AZA Lab is a fully automated, microcontroller-based Abel Flash Point Analyzer designed for accurate, safe, and repeatable determination of flash points of combustible liquids. Engineered to meet stringent international testing requirements, this advanced instrument conforms to IP 170, ISO 13736, and IS 1448 (Part 20) standards.
Covering a standard temperature range of –30°C to 70°C, extendable up to 110°C, the AZA1277 is ideally suited for laboratories involved in petroleum testing, petrochemical quality control, fuels research, and regulatory compliance.
Related products
DYNAMIC CONE PENETROMETER AZA0872
The AZA0872 Dynamic Cone Penetrometer (DCP) from Azalab is a robust, field-proven instrument designed for rapid in-situ evaluation of soil strength, stiffness, and compaction. It is extensively used by civil engineers, geotechnical consultants, and construction teams for pavement design, quality control, and site investigation works.
The DCP test provides a fast and economical method to assess the strength of subgrades, sub-bases, and granular base course layers, with results that can be directly correlated to California Bearing Ratio (CBR) values. This eliminates the need for time-consuming laboratory testing or undisturbed soil sampling, enabling immediate decision-making at site.
LIQUID LIMIT DEVICE WITH COUNTER AZA0853
The AZA0853 Liquid Limit Device with Counter from AZALAB is a precision-engineered instrument used for determining the liquid limit of soils in accordance with the Casagrande method. This test is a fundamental component of soil classification and geotechnical investigation, providing critical insight into the plasticity, compressibility, and shear strength of fine-grained soils.
Designed for reliable, repeatable, and standardized testing, the AZA0853 is widely used in geotechnical laboratories, civil engineering departments, construction quality control labs, and academic institutions.
Principle of Liquid Limit Test (Casagrande Method)
The liquid limit is defined as the water content at which soil transitions from a plastic state to a liquid state. In practice, it is determined as the moisture content at which a standard groove cut in the soil sample closes over a length of 12.5 mm under 25 blows of the liquid limit apparatus.
The AZA0853 consists of a polished brass cup mounted on an adjustable bracket. The cup is repeatedly raised and dropped from a fixed height of 1 cm onto a hard rubber base by means of a manually operated cam mechanism. A built-in mechanical counter accurately records the number of blows, ensuring compliance with testing standards and reducing operator error.
PARTICLE SIZE SEDIMENTATION (HYDROMETER METHOD) AZA0857
PLASTIC LIMIT SET AZA0848
- Soil classification (Atterberg limits)
- Assessing workability and consistency
- Evaluating shrink–swell characteristics
- Supporting foundation, pavement, and earthwork design
PLUMMET BALANCE AZA0862
SAND EQUIVALENT TEST SET AZA0859
SHRINKAGE LIMIT SET AZA0849
Standards Compliance
The AZA0849 Shrinkage Limit Set conforms to major national and international testing standards, ensuring reliable and universally accepted test results:- IS 2720 (Part VII)
- ASTM D427
- BS 1377
- AASHTO T 92
SPEEDY MOISTURE ZI 3027 METER (D2 LARGE) AZA0873
The AZA0873 Speedy Moisture ZI 3027 Meter (D2 Large) from Azalab is a high-performance field instrument designed for rapid and accurate determination of moisture content in soils, aggregates, sand, and similar materials. Based on the proven calcium carbide gas pressure method, this instrument is widely used in earthwork compaction control, road construction, geotechnical investigations, and concrete production, where immediate moisture data is critical for quality assurance.
The D2 Large configuration distinguishes the AZA0873 by allowing a larger sample size, providing more representative and reliable results, especially for heterogeneous materials and aggregates with larger particle sizes. Its rugged ZI 3027 construction ensures dependable performance under demanding site conditions.
