The cause of concrete cracking significantly influences the extent of corrosion of steel reinforcement. Thus, the type, width and orientation of cracking in a structural member normally provides an indication of the risk of corrosion. In practice, possible remedial measures might be considered only when the causes of cracks have been properly identified.
Type of cracks include:
Cracks before hardening
Cracks that form after hardening
Refer to Chapter 3 of the Guide to Concrete Repair and Protection, whose content comprises: