Appendix 9-6				January 29, 2016
Recommended Repairs for Cracking in PCC Pavements
Defect	Orientation	Location	Description			Dowelled/Undowelled Transverse Joints	Recommended Repair
Plastic Shrinkage	Any	Anywhere	Partial-depth and more than 0.007 in. wide			Either	Do nothing
Uncontrolled Crack	Transverse	Mid-Panel	Full-Depth			Undowelled	Saw/route and seal crack
						Dowelled	Full-Depth Repair or LTR^a
Uncontrolled Crack	Transverse	Crosses or ends at transverse joint	Full-Depth			Undowelled	Saw & seal crack;  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 5 ft. of joint	Full-Depth			Undowelled	Saw and seal crack Seal joint
						Dowelled	Full-Depth repair to replace crack and joint
Spalled sawcut or uncontrolled crack	Transverse	Anywhere	Spalling;  more than 3.0 in.wide			Either	Partial-Depth Repair
Uncontrolled Crack	Longitudinal	Relatively parallel to & within 1 ft. of joint;  May cross or end at longitudinal joint	Full-Depth			Either	Saw/route & seal the crack or cross-stitch the crack Epoxy sawed joint if uncracked
Uncontrolled Crack	Longitudinal	Relatively parallel to & within wheel path;  1 - 5 ft. from joint	Full-Depth, hairline, or spalled			Either	Remove and replace panel or cross-stitch crack
Uncontrolled Crack	Longitudinal	Relatively parallel to & further than 5 ft. from a longitudinal joint or edge	Full-Depth			Either	Cross-stitch crack
Spalled sawcut or uncontrolled crack	Longitudinal	Anywhere	Spalled			Either	Partial-Depth Repair
Uncontrolled Crack	Diagonal	Anywhere	Full-Depth			Either	Full-Depth Repair
Uncontrolled Crack	Multiple per panel	Anywhere	Two or more full depth cracks dividing panel into 3 or more pieces			Either	Remove and replace panel
Full-Depth repair per Specification 2529 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.				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.