For Aggregate Abrasion Value to EN 1097-8, BS 812:3
| Code | LAG170 |
| British standards | BS812-113 |
| Other standards | EN1097-8 |
| Weight (kg) | 190 |
| Tariff | 902480 90 |
Determination of Aggregate Abrasion Value
- The test gives a measure of the resistance of aggregate to surface wear by abrasion.
- The Dorry Abrasion Test was superseded in 1951 by the current AAV test.
- Inadequate abrasion resistance of road-surfacing aggregates means an early loss of the texture depth required to maintain high-speed skidding resistance.
Test Procedure
- Two specimens are pressed against the surface of a steel disc rotating in a horizontal plane, with a force of 0.365 newtons per sq. centimeter.
- Sand, fed by hoppers, is used as an abrasive.
- After 500-disc revolutions the amount of material abraded is measured by calculation of the weight loss of the aggregate.
- The percentage loss in mass of chippings as known as the ‘Aggregate Abrasion Value’ (AAV), and ranges from about 1 for hard flints to over 16 for aggregates normally considered too soft for use in road surfaces.
Features
- Heavy duty mainframe on adjustable anti-vibration pads
- Steel lap wheel 610 mm diameter
- Precision machined steel shaft and sealed bearings
- Resilient mounted electric motor
- Totally enclosed, grease filled gear box
- Scraper blades for sand removal
- Predetermined revolution counter
Supplied with:
- Two specimen moulds
- Two flat plates
- Two trays
Specification
| Width | 800mm |
| Depth | 700mm |
| Height | 1100mm |
| Volume (packed) | 0.79 cubic metres |
| Weight | 170kg |
| Electrical Supply | 230V 50Hz 1ph |
Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.
