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Concrete

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  1. Concrete

  2. Transverse Cracking

  3. Transverse Cracking • Causes: • Slab longer than 15’ • Slab Curl • Curing

  4. Transverse Cracking • Causes: • Slab longer than 15’ • Slab Curl • Curing

  5. Transverse Cracking • Causes: • Slab longer than 15’ • Slab Curl • Curing

  6. Transverse Cracking • Cures: • Crack Sealing • Full-depth rigid repair • Dowel bar retrofit

  7. Longitudinal Cracking

  8. Longitudinal Cracking • Causes: • Waiting too long to cut center joint

  9. Longitudinal Cracking • Causes: • Waiting too long to cut center joint • Subsoil settlement

  10. Longitudinal Cracking • Causes: • Waiting too long to cut center joint • Subsoil settlement

  11. Longitudinal Cracking • Causes: • Waiting too long to cut center joint • Subsoil settlement • Meander cracks

  12. Longitudinal Cracking • Cures • Joint Sealing • Full Depth replacement • Subsurface stabilization

  13. Pumping

  14. Pumping • Causes: • Water • Fines • Lack of load transfer • Loading

  15. Pumping • Causes: • Water • Fines • Lack of load transfer • Loading

  16. Pumping • Causes: • Water • Fines • Lack of load transfer • Loading

  17. Pumping • Cures • Under sealing • Dowel bar retrofit • Full depth rigid repair • Concrete pavement grinding

  18. Faulting

  19. Faulting • Causes: • End-result of pumping

  20. Faulting • Causes: • End-result of pumping • Eroded subsoil

  21. Faulting • Causes: • End-result of pumping • Eroded subsoil

  22. Faulting • Cures: • Full-depth rigid repair • Undersealing • Dowel bar retrofit • Grinding

  23. Transverse Joint Spalling

  24. Transverse Joint Spalling • Causes: • Improper dowel alignment

  25. Transverse Joint Spalling • Causes: • Improper dowel alignment • Lack of joint seal

  26. Transverse Joint Spalling • Causes: • Improper dowel alignment • Lack of joint seal • Incompressibles in joint

  27. Transverse Joint Spalling • Cures: • Crack & Joint Seal • Bonded Patching • Full-depth patching

  28. Wear & Polishing

  29. Wear & Polishing • Causes: • Traffic wears off surface aggregate

  30. Wear & Polishing • Cures: • Grinding • Asphalt Overlay

  31. Scaling

  32. Scaling • Causes: • Non-air-entrained concrete

  33. Scaling • Causes: • Non-air-entrained concrete • De-icing chemicals

  34. Scaling • Causes: • Non-air-entrained concrete • De-icing chemicals • Improper finishing technique

  35. Scaling • Cures: • Grinding • Asphalt overlay • Bonded resurfacing • Partial depth patch

  36. Shallow Reinforcing

  37. Shallow Reinforcing • Cause: • Reinforcing Steel too close to surface

  38. Shallow Reinforcing • Cause: • Reinforcing Steel too close to surface

  39. Shallow Reinforcing • Cure: • Asphalt overlay or patch • Replacing steel & partial or full depth repair

  40. D-Cracking

  41. D-Cracking • Causes: • Poor quality aggregate

  42. D-Cracking • Causes: • Poor quality aggregate • Freeze/thaw cycle

  43. D-Cracking • Cures: • Temporary: • Partial depth asphalt patch • Permanent: • Full-depth repair

  44. Corner Cracking

  45. Corner Cracking • Causes: • Insufficient soil support

  46. Corner Cracking • Causes: • Insufficient soil support • Temperature related slab movement

  47. Corner Cracking • Cures: • Partial or full-depth patch • Replace slab • Stabilize subsurface

  48. Blowups

  49. Blowups • Causes: • Expansion of concrete

  50. Blowups • Causes: • Expansion of concrete • Poorly sealed joints