Micro-Deval Abrasion Apparatus for Coarse Aggregate

Dual-jar rotating machine that wears wet aggregate with steel balls and water to gauge durability against abrasion. Used by highway agencies and quarry QC labs for pavement aggregates.

Specification

Aggregate and 5000 g of 9.5 mm steel balls are rolled with water in a closed jar at 100 rpm, simulating wet wear in service. The mass loss through a 1.6 mm sieve indicates aggregate toughness and is a reliable predictor of field performance. The machine suits qualification of base, surface and concrete aggregates.

Features

• Two stainless steel jars of 5 litre capacity
• Roller rotation fixed at 100 +/- 5 rpm
• Digital revolution counter with preset stop
• Rubber-coated drive rollers for quiet operation
• Includes steel charge balls

Technical Specifications

Jar capacity	5 litre, stainless steel, 2 nos.
Jar speed	100 +/- 5 rpm
Counter range	0 to 99999 revolutions
Steel charge	5000 +/- 5 g of 9.5 mm balls
Jar dimensions	195 mm dia x 170 mm height (internal)
Standards	ASTM D6928, ASTM D7428, EN 1097-1
Power supply	230 V AC, 50 Hz, 0.37 kW

Standard Accessories

• Steel ball charge
• Sieves 1.6 mm and 19 mm
• Jar gaskets