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 LTRa

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.