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General Items
LENGTH GAUGE AZA0971
The AZA0971 Length Gauge is a precision construction materials testing instrument designed to determine the elongation index of coarse aggregates. It is an essential tool for evaluating particle shape characteristics, which directly influence the strength, durability, and workability of concrete and asphalt mixes. The gauge is manufactured to strict quality standards, ensuring reliable and repeatable results in laboratory and field environments.
Key Features
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Designed for determining elongated particles in coarse aggregates
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Essential for concrete, bituminous, and road material analysis
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Precision metal frame with standard machined slot dimensions
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Heavy-duty, corrosion-resistant construction
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Accurate performance as per international and national standards
Description
The AZA0971 Length Gauge helps identify undesirable elongated aggregate particles (length > 1.8 × mean particle size), which can negatively affect compaction, mechanical interlock, and load-bearing performance in concrete and pavement structures.
When used together with a thickness gauge, this system provides a complete aggregate shape index evaluation solution, improving overall material quality control for highways, bridges, airfields, and structural concrete works.
Applications
- Coarse aggregate shape analysis
- Road and highway material quality control
- Ready-mix concrete plant testing
- Construction site material inspection
- Academic and research laboratories
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | AZA0971 |
| Slot Dimensions | 63, 50, 40, 31.5, 25, 20, 16 mm |
| Elongation Criteria | Length > 1.8 × mean sieve size |
| Material | Mild steel / Stainless steel |
| Frame Type | Heavy-duty, corrosion-resistant |
| Slot Accuracy | Machined as per IS 2386 requirements |
| Operation | Manual |
| Dimensions (Approx.) | 300 × 100 × 150 mm |
| Weight | Approx. 3 – 5 kg |
| Standards | IS 2386 (Part 1), ASTM C295 |
Standard Accessories
- Length gauge frame with slots
- User manual
- Calibration certificate
FAQ
Q1: What is the elongation index?
It is the percentage by weight of particles whose length exceeds 1.8 times their mean sieve size.
Q2: Why is this test important?
Elongated particles reduce concrete strength, compaction, and long-term durability.
Q3: Can AZA0971 be used alone?
It measures elongation, but it is recommended to use it along with a thickness gauge for complete shape index testing.
Q4: Is it suitable for field work?
Yes, the robust and portable design makes it ideal for both laboratory and site use.
Q5: How is the test performed?
Aggregates are passed through the standard slots, elongated particles are separated, weighed, and used to calculate the elongation index.
Additional information
| Slot Dimensions |
63, 50, 40, 31.5, 25, 20, 16 mm |
|---|---|
| Elongation Criteria |
Length > 1.8 × mean sieve size |
| Material |
Mild steel or stainless steel |
| Frame Type |
Heavy-duty, corrosion-resistant |
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High-precision thickness measurement for laboratory and field use
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Available in analog dial and digital LCD display models
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Lightweight, compact, and portable design
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Fast response time with stable, repeatable readings
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Easy zeroing and calibration mechanism
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