| Recommended Repairs for Cracking in PCC Pavements | |||||||||||
| Dowelled/Undowelled | |||||||||||
| Defect | Orientation | Location | Description | Transverse Joints | Recommended Repair | ||||||
| Plastic Shrinkage | Any | Anywhere | Partial-depth and more | Either | Do nothing | ||||||
| than 0.007 in. (0.18 mm) | |||||||||||
| wide | |||||||||||
| Uncontrolled Crack | Transverse | Mid-Panel | Full-Depth | Undowelled | Saw/route and seal crack | ||||||
| Dowelled | Full-Depth Repair or LTRa | ||||||||||
| Uncontrolled Crack | Transverse | Crosses or ends at | Full-Depth | Undowelled | Saw & seal crack; | ||||||
| transverse joint | Epoxy sawed joint if uncracked | ||||||||||
| Dowelled | Full-Depth Repair or | ||||||||||
| If crack jumps from sawcut to edge | |||||||||||
| of slab within 3 feet of edge of slab, | |||||||||||
| stop sawcut, saw & seal crack | |||||||||||
| Uncontrolled Crack | Transverse | Parallel to & within | Full-Depth | Undowelled | Saw and seal crack | ||||||
| 5 ft. (1.5 m) of joint | Seal joint | ||||||||||
| Dowelled | Full-Depth repair to replace | ||||||||||
| crack and joint | |||||||||||
| Spalled sawcut or | Transverse | Anywhere | Spalling; more than | Either | Partial-Depth Repair | ||||||
| uncontrolled crack | 3.0 in. (75 mm) wide | ||||||||||
| Uncontrolled Crack | Longitudinal | Relatively parallel to & within | Full-Depth | Either | Saw/route & seal the crack | ||||||
| 1 ft. (0.3 m) of joint; May | or cross-stitch the crack | ||||||||||
| cross or end at longitudinal joint | Epoxy sawed joint if uncracked | ||||||||||
| Uncontrolled Crack | Longitudinal | Relatively parallel to & within | Full-Depth, hairline, or spalled | Either | Remove and replace panel | ||||||
| wheel path; 1 - 5 ft. | or cross-stitch crack | ||||||||||
| (0.3-1.5 m) from joint | |||||||||||
| Uncontrolled Crack | Longitudinal | Relatively parallel to & further | Full-Depth | Either | Cross-stitch crack | ||||||
| than 5 ft. (1.5 m) from a | |||||||||||
| longitudinal joint or edge | |||||||||||
| Spalled sawcut or | Longitudinal | Anywhere | Spalled | Either | Partial-Depth Repair | ||||||
| uncontrolled crack | |||||||||||
| Uncontrolled Crack | Diagonal | Anywhere | Full-Depth | Either | Full-Depth Repair | ||||||
| Uncontrolled Crack | Multiple per panel | Anywhere | Two or more full depth cracks | Either | Remove and replace panel | ||||||
| dividing panel into 3 or more pieces | |||||||||||
| Notes: | Full-Depth repair per Specification 2529 | a | LTR = load-transfer restoration (if faulted less than 1/2"); 3 dowel bars per wheel path grouted into slots sawed across the crack. Slots must be parallel to each other and the longitudinal joint. Backfill with non-shrink, cement-based grout. Diamond grind if faulting is severe. | ||||||||
| Partial-Depth repair per Specification 2530 | |||||||||||
| Cross-stitch repair per Construction Manual 9.27 | |||||||||||
| Repairs should be made without use of Calcium Chloride | |||||||||||
| unless early opening to traffic is necessary. | |||||||||||