Standard Practice for Generating Pavement Surface Cracking Indices from Digital Images

Importancia y uso:

5.1 The PSCI provides a measure of the cracking observed on the pavement surface. It provides a quantitative and rational basis for rating pavement surface cracking to aid in determining maintenance and repair needs and priorities. Periodic monitoring of the PSCI can be used to establish feedback on pavement performance for validation or improvement of current pavement design and maintenance procedures. The PSCI is calculated from the PSCM.

5.2 The PSCM uses the openness or aperture size of the pavement surfacing caused by cracking as the objective function. This is a measure of the surface integrity due to cracking that relates to the area that could potentially admit surface water.

5.3 It also relates to the loss of horizontal tensile integrity at the surface because that is proportional to the total length of cracks and to interparticle load transfer, which is related in part to crack width.

5.4 It is, however, a purely physical dimensional measure and has no prior dependency on cause or type of cracking.

5.5 Any evaluation of the cause of the cracking, or of its impact on pavement performance, would be made independently together with other factors relevant to the particular purpose, as elaborated later.

5.6 Sealed cracks, potholes, and patching are not included in the PSCM and PSCI calculations.

Subcomité:

E17.42

Volúmen:

04.03

Número ICS:

93.080.01 (Road engineering in general)