How to Define the Concrete Surface Roughness

Surface Roughnous Measurement
Equipment for concrete roughness measurement
Definition of the concrete surface roughness in accordance with the German Standard “Rili-DAStb”
  • Defined Volume V (25 cm³ or 50 cm³)
  • Dried kiln quartz sand 0.1 – 0.3 mm
  • Round wooden disc (Ø 50 mm, thickness 10 mm)
Defined volume of quartz sand (I.e. 25 cm³) is to be placed onto the surface and distributed in a circling manner until the troughs are filled
RT = 40xV / p x d²

Surface RoughnessRoughness Definition by ICRI

The International Concrete Repair Institute (ICRI) has defined nine different guidelines for proper surface preparation and has developed profile replica blocks to give a visual point of reference for the user.

The nine profile replicas of the CSP standards can be obtained from ICRI.Each profile carries a CSP number ranging from a base line of 1 (nearly flat) through 9 (very rough).