Standard Practice for Calculating Pavement Macrotexture Mean Profile Depth

Importancia y uso:

5.1 This practice is suitable for the calculation of the average macrotexture depth from profile data. The results of this calculation (MPD) have proven to be useful in the prediction of the speed dependence of wet pavement friction.

5.2 The MPD can be used to estimate the result of a measurement of macrotexture depth using a volumetric technique according to Test Method E965. The values of MPD and MTD differ due to the finite size of the glass spheres used in the volumetric technique and because the MPD is derived from a two-dimensional profile rather than a three-dimensional surface. Therefore, a transformation equation must be used.

Note 2: The two concepts are closely related and have strong correlations; these correlations can differ depending on the pavement types used to establish the correlation. Although they are not the same physical characteristic, the MPD measurement technique is intended to replace the manual MTD measurements.

5.3 This practice may be used with pavement macrotexture profiles taken on actual road surfaces or from cores or laboratory-prepared samples.

5.4 Aggregate size, shape, and distribution are features which are not addressed in this practice. This practice is not meant to provide a complete assessment of texture characteristics. In particular, care should be used when interpreting the result for porous or grooved surfaces.

5.5 This practice does not address the problems associated with obtaining a measured profile. Laser or other optical noncontact methods of measuring profiles are usually preferred. However, contact methods using a stylus also can provide accurate profiles if properly performed.

Subcomité:

E17.23

Referida por:

E0867-23, E1960-07R23, E2380_E2380M-15R24, E2157-15R24

Volúmen:

04.03

Número ICS:

17.040.20 (Properties of surfaces)

Palabras clave:

macrotexture profile; mean profile depth; mean texture depth;