PC Type N:The world‘s most advance rebound hammer, with unmatched dispersion characteristics, durability and measuring range.
Independent validation testing by BAM Germany has shown that the SilverSchmidt’s patented measuring principle has less dispersion than the classical hammers over the entire range.
Its inherent impact angle independence removes one possible source of user error completely. Automatic evaluation according to pre-defined statistical criteria and software analysis tools, greatly enhance the uniformity assessment application.
All major standards recommend to create mixtures specific curves. Such user defined correlation curves can be downloaded via the powerful Hammerlink software (PC version only) onto the hammer. This, together with on board correction for form factor and carbonation allows the best possible assessment of compressive strength.
- Procedure
The procedure of carrying out Rebound Hammer Test was as described in I.S: 13311 (Part 2)-1992.
Use the grinding stone to smoothen
the test surfaces. Perform a few test impacts with the concrete test hammer on this smooth, hard surface before taking any measurements which you are going to evaluate. Perform a consistency
check on the test anvil.
Fig. B: Surface Preparation for Rebound Hammer Test
The number of test impacts required for a valid rebound number is defined in the standards. Typically, this will be at least nine impacts. The individual impact points must be spaced at least25 mm apart. Push the concrete test hammer against the test surface at moderate speed until the impact is triggered.