ASTM International

Standard Test Method for Measuring the Frictional Properties of Winter Contaminated Pavement Surfaces Using an Averaging-Type Spot Measuring Decelerometer
 N E2101

Annotation

This test method covers the measurement of the frictional properties of winter contaminated pavement surfaces using an averaging-type spot measuring decelerometer. If a data phone is used, it should meet all the requirements where the word decelerometer is used in this standard. The method produces a reading that is proportional to the deceleration sustained by a test vehicle fitted with pneumatic rubber tires braking with all wheels locked. A friction index for a section of winter contaminated pavement is determined from the average of several deceleration measurements recorded over the section of winter contaminated pavement.

This test method is applicable to averaging-type spot measuring decelerometers.

This test method is applicable to the following winter contaminated pavement surface conditions:

Ice;

Wet ice (ice covered with a thin film of moisture of a depth insufficient to cause hydroplaning);

Compacted snow, any depth;

Slush on ice, slush not exceeding 3 mm (0.1 in.) in depth;

Loose, dry snow, not exceeding 25 mm (1 in.) in depth;

Ice control chemical solution on ice; and

Sand on ice.

This test method shall not be used when the following winter contaminated pavement surface conditions are present: