Remove loose concrete or loosened aggregate by hammer or wire brush. Prevent the application of large forces such as electrical chippers to avoid sound concrete damage around the honeycomb area.
Clean any dirt or loose material from the area.
Wet the cleaned area before applying the repair material.
Fill small voids and cracks using a mechanical injection pressure pump with a suitable material such as non-shrinkage epoxy grout.
If the honeycomb covers a large area, you may need to create a patch hole to ensure proper bonding.