Shoving

PCC pavements occasionally increase in length at ends where they adjoin flexible pavements (commonly referred to as "pavement growth"). This "growth" shoves the asphalt- or tar-surfaced pavements, causing them to swell and crack. The PCC slab "growth" is often caused by a gradual opening up of the joints as they are filled with incompressible materials that prevent them from reclosing.

Severity Distress Example Description
Low Overview photo showing a longitudinal joint between a PCC and an asphalt pavement.            The photo shows a slight amount of shoving of the asphalt for a short distance along the joint. A slight amount of shoving has occurred, with little effect on ride quality and no break-up of the asphalt pavement.

Height Differential: < 3/4 in (< 20 mm)
Medium Overview photo showing an asphalt surface around the corner of a PCC slab.            The asphalt at the joint between the PCC and asphalt surfaces is noticeably higher than the PCC slab. A significant amount of shoving has occurred, causing moderate roughness or break-up of the asphalt pavement.

Height Differential: 3/4 to 1 1/2 in (20 to 40 mm)
High Close-up photo showing a longitudinal joint between a PCC and an asphalt pavement.            The asphalt surface in the photo has a considerable amount of distress that has occurred from shoving. A large amount of shoving has occurred, causing severe roughness or break-up of the asphalt pavement.

Height Differential: > 1 1/2 in (> 40 mm)