Use batched concrete for

repairing

large spalls and defects in concrete members, or when removing and replacing large concrete components. Using batched concrete ensures that the repair material properties will be the same or similar to the parent concrete.

Batched concrete is required in structural applications because it becomes more critical that the repair material have similar material properties as the parent concrete. Proprietary bagged mixes may only be used in structural applications if specifically authorized by the Engineer.