SCRIM

Adherence control on wet pavements


The essay consists of pouring water onto the pavement surface, immediately before the passage of the measuring wheel, in order to obtain the friction of the wet pavement with a water film between 05 to 1 millimeter For this purpose, the equipment has a water tank, ranging from 6,000 to 29,000 liters depending on the equipment.

An electronic data processing system is responsible for processing the information received from measurement devices and coordinating it based on the measurement speed Simultaneously with the data collection from sliding, the circulation speed and distance traveled are also measured.

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The test wheel is subjected to a known vertical load, although it is allowed to rotate, i.e. it is not blocked. When the wheel is dragged in the direction of the longitudinal axis of the vehicle, a force perpendicular to the plane formed by the test wheel is generated in the contact area of the road and the tyre.

The team uses the oblique force method to measure slip resistance on wet surfaces.
It consists of a test wheel placed at a drift angle of 20º relative to the vehicle's longitudinal axis A vertical load of 200 kg is applied to the wheel (smooth, durable tire).

The Scrim equipment allows, with a laser sensor, the continuous measurement of the macrotexture of the pavement at the speed of movement of the equipment. It also has independent sensors to determine the ambient temperature and the temperature of the pavement.
It has a panoramic front camera with x, y, z coordinates, for taking inventory.

The Scrim II equipment, with its two water tanks, a built-in 6,000-litre tank and the 18,000-litre tanker, allows a large number of measurements to be carried out as it has a range of up to 350 km.