Messverfahren zur Bestimmung der Rautiefe von Betonoberflächen

摘要

A reliable determination of the mechanical properties of the interface between to concrete cast at different times of great importance for design of structural concrete. The assessment of the roughness of a concrete surface is realized by the reference value of the mean roughness. A standard method for determining the roughness is the so-called sand patch method by Kaufmann. To improve the reliability of roughness measurements of concrete surfaces and to extend the scope of use on vertical and inclined surfaces, alternative measurement methods have been developed which are based on optical methods. Such methods are for example the laser triangulation or photogrammetry. In this paper, the application of the aforementioned methods for determining the roughness is described. In the course of tests on semi-precast slabs, the methods are applied to roughened concrete surfaces for comparison.