SCRIM
SCRIM (Sideway-force Coefficient Routine Investigation Machine) is a machine, originally developed by TRL Limited in the United Kingdom, in order to measure the wet skidding resistance of a road surface.[1]
SCRIM has a daily survey capacity of 200 to 300 km depending upon road type. A SCRIM survey in the UK can be undertaken at two different target test speeds of 50 and 80 km/h. The permitted speed range covering these target speeds is 25 to 85 km/h.[2] Skidding resistance data recorded at speeds within this range can be speed corrected to give equivalent values at 50 km/h.
Besides being the main equipment used for friction testing in the United Kingdom, it is also used throughout the world, including Spain, Italy, France, Belgium, New Zealand, Australia, Chile and Argentina.
The SKM is a similar device to the SCRIM. It also operates on the sideway force principle and is the main equipment used for friction testing throughout Germany.
Other friction testing devices include the Pavement Friction Tester, devices by Norsemeter, ViaTech and the Griptester all devices have their own benefits.