A significant correlation between test results from a percussion sounding apparatus and the California Bearing Ratio (CBR value) has been established for fine soils ranging from silt to fine sandy soils I (D < 0,2 mm).
In a standardized form this equipment and test method can render invaluable services:
It has been quite a few years since nuclear measurement methods made their appearance in road construction to check the density of various materials in pavement structures. Yet there has been no proper breakthrough of such measurements in Belgium to date, whereas our neighbours have used the method sucessfully for several years.
BRRC has a static device for measuring skid resistance in places where conventional skid resistance measurements with measuring vehicles are impossible, such as footways, driveways, industrial floors, road markings, shopping streets, entrance halls, etc. It is the Skid Resistance Tester of the British Transport Research Laboratory (TRL), shortly referred to as SRT by professionals.
BRRC’s information leaflet A57 decribes the device and its applications.