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Low-SEVERITY Longitudinal Cracks
or Joints 

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If you have low-severity longitudinal cracks while aggregate interlock is still intact, you need to perform:

 

Cross-Stitching or Slot-Stitching

Cross- and slot-stitching can be used to maintain aggregate interlock, providing added reinforcement and strength to longitudinal cracks and unreinforced longitudinal joints. Tie bars used in stitching inhibit the crack or joint from vertical and
horizontal movement or widening. Cross-stitching uses deformed tie bars (typically 0.75-inch in diameter) epoxied or grouted into holes drilled at an angle through a crack or longitudinal joint, whereas with slot-stitching the bars are grouted into slots cut across the crack/joint. Cross- and slot-stitching should be used on longitudinal cracks/joints that are in reasonably good condition. Transverse cracks/joints should not be treated using this repair method.

If aggregate interlock is lost, refer to the cracked slab section.

Resources

Concrete Repair Best Practices

MoDOT Report: A Series of Case Studies

Resource Type:

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Technical Info

City/Municipal, Highway

Concrete Pavement Preservation and Restoration, Diamond Grinding, Dowel Bar Retrofit, Full & Partial Depth Repair, Joint and Crack Resealing

Structural/Material Issues

Cross Stitching

Missouri DOT Tech Brief

Resource Type:

Resource Sections:

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Technical Info

Airport/Airfield, Bridge, City/Municipal, Highway, Industrial, Race Track

Cross/Slot Stitching

Structural/Material Issues

FHWA Checklist - Cross Stitching for Portland Cement Concrete Pavements

Pavement Preservation Checklist Series

Resource Type:

Resource Sections:

Resource Techniques:

Resource Issues:

Technical Info

Airport/Airfield, Bridge, City/Municipal, Highway, Industrial, Race Track

Cross/Slot Stitching

Structural/Material Issues

Minnesota State Aid Concrete Pavement Rehabilitation Best Practices Manual

Resource Type:

Resource Sections:

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Resource Issues:

Technical Info

Bridge, City/Municipal, Highway

Concrete Pavement Preservation and Restoration

Structural/Material Issues

Progressive Concrete Pavement Preservation Strategy Improves City Streets in Minneapolis

A Progressive Concrete Pavement Preservation Strategy Improves City Streets in Minneapolis

Resource Type:

Resource Sections:

Resource Techniques:

Resource Issues:

Case Study

City/Municipal

Cross/Slot Stitching, Diamond Grinding, Dowel Bar Retrofit, Full & Partial Depth Repair, Joint and Crack Resealing, Slab Stabilization

Friction/Safety, Sustainability/Environmental

CPP for City Streets

Smooth pavements last longer

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Fact Sheet

City/Municipal

Concrete Pavement Preservation and Restoration

Smoothness, Structural/Material Issues, Sustainability/Environmental

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