Length Gauge – Elongation Index of Aggregates
The Length Gauge, also known as an Elongation Gauge, is designed for determining the elongation index of coarse aggregates. This index refers to the percentage by weight of particles whose greatest dimension exceeds 1.8 times their mean dimension, as defined in BS 812. It is an essential tool in evaluating aggregate shape characteristics, which directly affect concrete strength, compaction, and workability.
This gauge is manufactured with precision-cut metal slots, ensuring reliable measurements and repeatability in both field and laboratory applications.
Key Features of Length Gauge
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Precision-Cut Slots: Seven accurately spaced openings for measuring elongated particles.
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Durable Build: Constructed from high-grade mild steel or stainless steel to withstand rigorous use.
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Corrosion-Resistant Finish: Powder-coated or polished for protection and longevity.
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Easy Handling: Lightweight and ergonomically designed for quick, accurate aggregate testing.
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Complies with Standards: Built to BS 812 specification for elongation index determination.
Applications of Length Gauge
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Aggregate Shape Quality Control: Ensures aggregates used in concrete and asphalt mixes meet required shape specifications.
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Pavement and Road Construction: Helps ensure aggregate stability under repeated loads.
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Concrete Mix Design: Identifies elongated particles that may compromise concrete compaction and strength.
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Geotechnical & Civil Engineering Labs: Standard equipment in material testing and research environments.
Optional Accessories
| Item | Code |
|---|---|
| 300 mm Dia BS Sieve – 5.60 mm to 63.0 mm | 79-2520 to 79-2670 |
| 300 mm Dia Lid and Receiver | 79-2010 / 79-2020 |
| ELE Sieve Shaker | 80-0200/01 / 80-0200/06 |
| Sample Trays (406 mm or 1200 mm) | 81-4030 / 81-4230 |
| Shovel with Flat Blade | 81-0240 |
Alternative Products
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Flakiness Gauge – Code: 42-0410
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Set of Flakiness Sieves – Code: 42-0600
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Air Jet Sieving Machine – Code: 80-0300/09
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