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CALIFORNIA BEARING RATIO APPARATUS(ASTM VERSION MOULD) AZA0910
The AZA0910 California Bearing Ratio (CBR) Apparatus – ASTM Version Mould from Azalab is a precision-engineered laboratory system designed to determine the bearing strength of subgrade soils and pavement base materials in strict accordance with ASTM D1883. This apparatus plays a critical role in pavement and foundation design by evaluating soil resistance to penetration under controlled compaction and moisture conditions.
Widely used in highway, airfield, and infrastructure projects, the AZA0910 provides reliable and repeatable CBR values essential for assessing soil suitability and structural performance of road foundations.
Description
Applications
The AZA0910 CBR Apparatus is essential for:
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Subgrade strength evaluation for highways and runways
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Design of base and sub-base layers in pavement construction
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Comparative analysis of soil types under standardized compaction
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Soil stabilization and improvement studies
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Laboratory quality control for infrastructure and civil projects
Both soaked and unsoaked CBR tests can be conducted, enabling simulation of worst-case field conditions such as prolonged rainfall or water saturation.
Construction & Features
The ASTM version mould is dimensionally designed to comply with U.S. and international standards and differs from BS-type moulds.
ASTM Mould Construction:
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Internal diameter: 6 inches (152 mm)
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Height: 7 inches (177.8 mm)
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Detachable base plate
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Removable extension collar
Standard Supply Includes:
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ASTM CBR mould with base plate and extension collar
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Penetration piston (50 mm diameter) with adjustable loading stem
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Dial gauge or optional digital displacement indicator
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Annular and slotted surcharge weights (typically 2.5 kg each)
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Spacer disc and perforated plate
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Optional soaking tank for wet CBR testing
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Compatible with manual or motorised loading frames
All components are manufactured from corrosion-resistant steel, precision-machined for durability, dimensional accuracy, and long service life.
Standards & Compliance
The AZA0910 fully complies with:
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ASTM D1883 – CBR of Laboratory-Compacted Soils
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AASHTO T193 – CBR of Laboratory-Compacted Soils
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Compatible with ASTM D698 and ASTM D1557 compaction methods
This ensures universal acceptance of test results for pavement and foundation design.
Key Benefits
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Precision-engineered mould and accessories for ASTM-compliant testing
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Suitable for soaked and unsoaked CBR evaluations
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Compatible with motorised and manual load frames
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Rugged laboratory-grade construction for repeatable results
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Clear and reliable CBR value determination for pavement design
Specifications
| Feature | Specification |
|---|---|
| Model | AZA0910 |
| Product Type | CBR Apparatus – ASTM Version Mould |
| Mould Internal Diameter | 6 inches (152 mm) |
| Mould Height | 7 inches (177.8 mm) |
| Mould Material | Mild Steel / Stainless Steel |
| Penetration Piston Diameter | 50 mm |
| Penetration Measurement | Dial Gauge / Digital (0.01 mm resolution) |
| Loading Frame Capacity | 50 kN / 100 kN (manual or motorised) |
| Surcharge Weights | 2.5 kg annular and slotted |
| Spacer Disc Thickness | 50 mm (standard) |
| Testing Type | Soaked and Unsoaked CBR |
| Standards Compliance | ASTM D1883, AASHTO T193 |
| Application | Soil bearing capacity for road foundations |
Frequently Asked Questions (FAQ)
Q1: What is the difference between ASTM and BS CBR moulds?
ASTM moulds are 6 inches (152 mm) in diameter and 7 inches high, whereas BS moulds use different dimensions. ASTM moulds comply with U.S. and international pavement design standards.
Q2: Can soaked and unsoaked tests be performed?
Yes. With a soaking tank and appropriate surcharge weights, both test conditions are supported.
Q3: Is this apparatus suitable for field testing?
No. AZA0910 is designed exclusively for controlled laboratory testing.
Q4: Can it be used with a motorised load frame?
Yes. It is fully compatible with both motorised and hand-operated loading frames.
Q5: What is the purpose of the CBR value?
The CBR value is used to assess subgrade and base-layer strength for pavement and roadway design.
Additional information
| Mould Internal Diameter |
6 inches (152 mm) |
|---|---|
| Mould Height |
7 inches (177.8 mm) |
| Mould Material |
Mild Steel / Stainless Steel |
| Loading Piston Diameter |
50 mm |
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