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Skid Resistance Testing

The Pendulum Skid Resistance Tester was originally designed in the 40s in the USA, and further developed in the 1960s at the TRL (Transport Research Laboratory) for the testing of road surfaces.

The device measures the frictional resistance between a rubber slider mounted on the end of a pendulum arm and the surface to be tested. This provides road engineers with a method of checking the resistance of wet and dry surfaces to slipping and skidding, both in the lab and insitu.

It operates by a pendulum rotating about a spindle which is attached to a vertical pillar. At the end of the tubular arm a head of known mass is fitted with a rubber slider. The pendulum is released from a horizontal position so that it strikes the sample surface at a constant speed. The distance travelled by the head after hitting the sample is determined by the friction of the sample surface. 

Model No. Desc
42-6000/12 3.00” Rubber Mounted TRL (55) Slider
42-6000/13 3.00” Rubber Mounted Four S (96) Slider
42-6200 Base Plate for Skid Resistance Tester for lab testing
42-6000/11 1.25” Rubber Mounted PSV Slider
42-6000/14 3.00” Rubber Mounted CEN Slider
42-6000/10 Set of 3 Spreader Feet for Skid Resistance Tester for in-situ testing
42-6000 Pendulum Skid Resistance Tester

Surface Regularity

Surface Dressing

The main purpose of a surface dressing is to prevent weathering, disintegration of the pavement and to increase the resistance to skidding in wet weather. The rate of spread and application of the chippings and binder is specified for most applications. Test methods have been developed to determine the actual rate of spread and are described in British Standards.

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