Why Does Rutting Happen in Asphalt?

Rutting is a term for when permanent deformation or consolidation accumulates in an asphalt pavement surface over time; this is typically shown by the wheel path being engraved in the road. ... Rutting can be caused by lack of compaction, insufficient pavement thickness, and weak asphalt mixtures (Walker).

Why does rutting occur?

Possible Causes

Specific causes of rutting can be: Mix rutting. Improper mix design or manufacture (e.g., excessively high asphalt content, excessive mineral filler, insufficient amount of angular aggregate particles) Subgrade rutting: subgrade deforms under load.

What is rutting in pavement design?

Rutting is the longitudinal depression in the wheel path in bituminous pavements, which can be attributed to excessive consolidation, formed by an accumulation of permanent deformations caused by repeated heavy loads, or lateral movement of the material, caused by shear failure of the bituminous concrete layer, or a ...