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SKID RESISTANCE & FRICTION TESTER

Skid resistance apparatus are used to measure the frictional resistance between a tire and a road or pavement surface, primarily to assess the safety and performance of road surfaces. These tests help determine how well a tire can grip and prevent skidding, especially in wet conditions. 

Here’s a more detailed breakdown:

What they measure:
  • Surface friction:
    Skid resistance apparatus measure the friction between a rubber slider (or a tire) and the road surface. 

  • Skid resistance value:
    The measurement, often expressed as a British Pendulum Number (BPN) or Skid Number, indicates the resistance to skidding. 

  • Microtexture:
    The apparatus can also assess the microtexture of the surface, which contributes to friction. 

Why they are used:
  • Road safety:
    Skid resistance is crucial for preventing vehicle accidents, especially in wet weather. 

  • Pavement quality:
    Skid resistance tests help evaluate the quality of pavement materials and construction practices. 

  • Maintenance and rehabilitation:
    Measurements are used to track the deterioration of pavement and determine when maintenance or rehabilitation is needed. 

  • Material testing:
    Skid resistance tests can be used to evaluate the skid resistance of various paving materials, such as asphalt and concrete. 

  • Polished Stone Value (PSV):
    Some apparatus can also be used to measure the PSV of aggregates, which is the resistance of the aggregate to polishing. 

Types of apparatus:
  • Portable Skid Resistance Tester (Pendulum Tester):
    A common type, it uses a pendulum with a rubber slider to measure friction. 

  • Locked Wheel Tester:
    A more sophisticated method that uses a locked wheel to simulate braking and measure friction. 

  • Other types:
    There are also various other types of skid resistance testers, including those that measure friction between a tire and a road surface. 

In essence, skid resistance apparatus are essential tools for ensuring safe and high-performing road surfaces. 

 

This apparatus measures the skid resistance between a rubber slider (mounted on the end of a pendulum arm) and the test surface. This provides highway engineers with a routine method of checking the resistance of wet and dry surfaces to slipping and skidding, both in the lab and on site.

Portable instrument, simulates, as far as possible, sliding between the vehicle tyre and the road. The apparatus measures the frictional resistance between a special rubber slider and road surface. May also be used for “Polished Stone Value” test using specimens obtained using the Accelerated Polishing machine. When interpreting the results it is necessary to take into consideration the different operating conditions (wet or Dry road) the kind of road (uneven or with slope) the speed etc.

 

 

Click Below for Operating Manual:

SKID RESISTANCE TESTER