For repairing Honeycomb in Concrete you have follow below procedure:-
1. Remove all loose aggregate and concrete particles with the help of wire brush.
2. Now clean the surface finer and remove all particles.
3. Let the surface dry and well and now apply chemi-fix glue on the area.
4. Now mix the concrete grout with white cement and water as per requirement.
5. Now apply the paste into the affected area and fill all Honeycomb completely.