MEASUREMENT OF SURFACE EROSION OF CONCRETE SLATS

An instrument is described which has been developed to measure the ave rage attack depth of concrete slats, i.e. the volume of eroded concret e per unit of surface area. The measuring instrument is used to enclos e part of a slat beam and defines the height of the formerly unattacke d concrete surface, which afterwards can be reconstructed with sand. T he volume of sand and the surface area of the sand spot are measured a nd the average thickness of the eroded concrete layer is calculated.