This publication provides introductory technical guidance for civil engineers and other professional engineers, construction managers and facility maintenance staff interested in repairing concrete structures. Here is what is discussed: 1. INTRODUCTION, 2. ADDITIONAL REINFORCEMENT, 3. AUTOGENOUS HEALING, 4. CONVENTIONAL CONCRETE PLACEMENT, 5. CRACK ARREST TECHNIQUES, 6. DRILLING AND PLUGGING, 7. DRYPACKING, 8. FIBER-REINFORCED CONCRETE, 9. FLEXIBLE SEALING, 10. GRAVITY SOAK, 11. GROUTING (CHEMICAL), 12. GROUTING (HYDRAULIC-CEMENT), 13. HIGH-STRENGTH CONCRETE, 14. JACKETING, 15. JUDICIOUS NEGLECT, 16. OVERLAYS (POLYMER), 17. OVERLAYS (PORTLAND-CEMENT), 18. POLYMER COATINGS, 19. POLYMER CONCRETE/MORTAR, 20. POLYMER PORTLAND-CEMENT CONCRETE, 21. POLYMER IMPREGNATION, 22. POLYMER INJECTION, 23. PRECAST CONCRETE, 24. PREPLACED-AGGREGATE CONCRETE, 25. RAPID-HARDENING CEMENTS, 26. ROLLER-COMPACTED CONCRETE, 27. ROUTING AND SEALING, 28. SHOTCRETE, 29. SHRINKAGE-COMPENSATING CONCRETE, 30. SILICA-FUME CONCRETE, 31. SLABJACKING, 32. STITCHING, 33. UNDERWATER CONCRETE PLACEMENT.