ASTM E445/E445M-15 (R2019) PDF Download

ASTM E445/E445M-15 (R2019) is a standard test method that focuses on measuring the stopping distance on paved surfaces using a passenger vehicle equipped with full-scale tires. The purpose of this test method is to provide additional information on the skid resistance of pavement surfaces. By using this test method alongside other physical and chemical tests, the skid resistance values obtained can help determine the suitability and adequacy of paving materials or finishing techniques. This can lead to improvements in pavement maintenance practices and schedules.

It is important to note that the stopping distance values obtained through this test method may not directly correlate with other methods of measuring skid resistance. This test method is specifically designed for research and development purposes, where comparisons between pavement surfaces are to be made within the same test program.

The test method involves measuring the stopping distance on paved surfaces using a passenger vehicle equipped with specified full-scale automobile tires. The non-steady state skid resistance is measured as the vehicle decelerates over a wetted pavement surface, with all four wheels locked. The test is conducted under specific conditions, including limits on static wheel load and starting speed, and the vehicle is required to remain essentially parallel to its original direction of motion.