It is robustly designed to determine the Aggregate Impact Tester with Blow Counter (AIV) of aggregates which provides a relative measure of the resistance of an aggregate to sudden shock or impact.

The property of a material to resist impact is known as toughness. Due to movement of vehicles on the road the aggregates are subjected to impact resulting in their breaking down into smaller pieces.

The aggregates should therefore have sufficient toughness to resist their disintegration due to impact. This characteristic is measured by impact value test.

• IS:2386 (PART IV) 9377
• BS 812:112

It is robustly designed to determine the aggregate impact value (AIV) of aggregates which provides a relative measure of the resistance of an aggregate to sudden shock or impact. The counter fitted to the machine automatically records the number of blows delivered to the sample, manufactured from heavy duty plated steel to resist corrosion.

• The instrument consists of a circular base with Two vertical guides. The Hammer of weight 13.75 +/-0.25kg can be raised to fall freely down the vertical guides.
• The Height of fall can be adjusted through 380 +/- 5mm. The Hammer is provided with a locking arrangement.
• The hammer falls freely to the base and is removable for employing. Supplied complete with metal measure 75mm dia x 50mm high
• (For specimen preparation) and Tamping Rod 230mm long x 10mm diameter.
• A Blow Counter to count the number of strokes is fitted on top of the equipment.