Testing concrete in structures - Part 2: Non-destructive testing - Determination of rebound number

2Scope / Description

This European Standard defines a method for determining the rebound number of a localized area of hardened concrete using a spring-operated hammer.
NOTE 1: The rebound number determined by this method may be used for assessing the uniformity of concrete on a construction site and for delineating zones or areas of low quality or damaged concrete in structures.
NOTE 2: This method is not intended as an alternative to the test method for determining the compressive strength of concrete (EN 12390-3); however, with suitable correlation, it may be employed to assess the compressive strength of structural concrete. For assessment of compressive strength of structural concrete, refer to EN 13791.
NOTE 3: The hammer may be used for comparative testing, comparing against concrete of known strength or concrete known to belong to a defined concrete batch that conforms to a specific strength class.