1、 Scope of application:

This instrument is used to determine the impact value test of coarse gravel materials, in order to determine the ability of the aggregate to resist instantaneous impact or impact.

2、 Main technical parameters:

1. Measuring cylinder: inner diameter 76mm, inner height 51mm, wall thickness 3mm

2. Impact cup: a circular steel cylinder with an inner diameter of 102mm and an inner height of 50mm, with a tempered inner surface.

3. Compaction rod: Steel rod with a diameter of 16mm, a length of 600mm, and a hemispherical end.

4. Impact hammer weight: 13.75Kg ± 0.05Kg, with a lower cylindrical diameter of 100mm and a bottom edge of 1.5mm

Chamfering and surface quenching.

5. Impact hammer drop height: 380 ± 5mm.

6. Counter: 6-digit