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Dorry Abrasion Machine TO BS812-113, EN1097-8 (LAG170)

Dorry Abrasion Machine TO BS812-113, EN1097-8 (LAG170)

SKU LAG170 Category

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  • The Dorry Abrasion Test was superseded in 1951 by the current AAV test.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.


  • 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


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.