ACI PRC-364.9-21 PDF Download

The ACI PRC-364.9-21 standard addresses the concern of cracks in concrete repairs. The standard highlights that cracks in a repair can have a negative impact on the performance, service life, and durability of the repair. Cracks provide a direct path for harmful elements to enter the repair, compromising its integrity. In the case of structural repairs, cracks can also affect the load-carrying capacity of the repaired structure.

The standard emphasizes the importance of evaluating the cause and consequences of cracks in the repair, and suggests that a licensed design professional should be involved in developing a remediation approach if necessary. If the cracks pose a risk to the load-carrying capacity of the repaired structure, appropriate measures should be taken. The standard also references ACI 562, which requires that cracking mitigation be considered in the design of concrete repairs.