Punchout

Description

Localized slab portion broken into several pieces. Typically a concern only with CRCP.

Severe punchout.
Figure 1: Severe punchout.

Problem

Roughness, allows moisture infiltration leading to erosion of base/subbase support, cracks will spall and disintegrate.


Possible Causes

Can indicate a localized construction defect such as inadequate consolidation. In CRCP, it can be caused by steel corrosion, inadequate amount of steel, excessively wide shrinkage cracks or excessively close shrinkage cracks.

Repair

Full-depth patch.