Rock
Aggregate
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Concrete
Soil
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Bitumen/Asphalt
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General Items
AVERAGE LEAST DIMENSION AZA0976
The AZA0976 Average Least Dimension (ALD) Gauge is a precision instrument designed to measure the flakiness index of coarse aggregates. It is widely used in civil engineering and construction materials laboratories to evaluate the shape and quality of aggregates for concrete and asphalt applications. Manufactured as per IS 2386 (Part I), this gauge ensures accurate, repeatable, and reliable dimensional classification.
Key Features
- Measures flakiness index of coarse aggregates
- Fully compliant with IS 2386 (Part I) standards
- Precision steel frame with clearly labeled slots
- Easy-to-use, manual operation for rapid testing
- Heavy-duty, corrosion-resistant construction
- Suitable for laboratory and field environments
Description
Why ALD Testing Is Important
Flaky and elongated aggregates create voids in compacted layers, leading to:
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Reduced mechanical strength
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Higher water and binder demand
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Poor interlocking and stability
The AZA0976 helps identify unsuitable particles and ensures only quality aggregates are used in critical infrastructure projects.
Working Principle
The gauge uses standard-sized slotted openings:
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Aggregate particles are passed through the slots manually
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Particles passing through slots < 0.6 × their nominal size are classified as flaky
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The flakiness index is calculated as a percentage by weight
Applications
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Highway and pavement engineering
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Concrete and asphalt mix design
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Construction material QC departments
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Research and academic laboratories
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Aggregate crushing and screening plants
Technical Specifications
| Parameter | Specification |
|---|---|
| Model No. | AZA0976 |
| Slot Material | Stainless steel / Powder-coated steel |
| Slot Size Range | 6.3 mm to 63 mm |
| Gauge Type | Manual drop-through slotted gauge |
| Frame Type | Compact benchtop steel frame |
| Operation | Manual |
| Standards | IS 2386 (Part I), ASTM D4791 (Reference) |
| Accessories | Instruction manual |
FAQ
Q1: What does the AZA0976 ALD Gauge measure?
It measures the average least dimension of coarse aggregate particles to determine the flakiness index.
Q2: Is it IS-standard compliant?
Yes, it is fully compliant with IS 2386 (Part I).
Q3: What particle sizes can be tested?
It supports sizes from 63 mm to 6.3 mm.
Q4: Where can it be used?
It is suitable for civil engineering laboratories, construction sites, and quality control departments.
Q5: Does it require calibration?
No calibration is required, but periodic visual inspection is recommended.
Additional information
| Slot Material |
Stainless steel or powder-coated steel |
|---|---|
| Slot Sizes |
63 mm to 6.3 mm (as per IS 2386) |
| Gauge Type |
Manual drop-through size gauge |
| Frame Dimensions |
Compact bench-top frame |
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Used for measuring bulk density and void ratio of aggregates
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Heavy-duty mild steel / aluminum construction
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Corrosion-resistant, long-life surface finish
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Easy-grip handles for portability
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