1. Rationale
During the friction workshop at Penn State, the CT Meter and the Messtechnik device differed greatly on results for the grooved surface. It was determined that this was due to the differences in measuring radii between the two devices. The data from the smaller radius device was more susceptible to placement (how many grooves in the measuring area) than the larger radius device. Therefore, a decision was made to look more closely at E2157 to see if it can be adapted to all circular texture measuring devices (with different radii); or if it should be kept as it is and a new standard drafted to cover other circular texture measuring devices.
Keywords
pavement texture; skid resistance; Pavement surfaces (skid resistance); CCD (charge coupled device) laser-displacement sensor; CTMeter (circular track meter);
Citing ASTM Standards
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