SUBSURFACE VOIDS
If you have subsurface voids, you need to perform:
Slab Stabilization
Subsurface restoration consists of pressure insertion of flowable material, usually a cementitious grout or urethane material, into the voids. The nondestructive processes provide both short- and long-term reductions in pavement deflection and are most effective on pavements with minimal structural damage.
The best time to perform subsurface restoration is soon after loss of support becomes evident. In addition to visual inspection, several tools are available for detecting voids under pavement, including deflection measurement, ground
penetrating radar and epoxy/core tests. Subsurface restoration should be used in conjunction with other concrete pavement preservation (CPP) techniques.
Resources
Concrete Repair Best Practices
MoDOT Report: A Series of Case Studies
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City/Municipal, Highway
Concrete Pavement Preservation and Restoration, Diamond Grinding, Dowel Bar Retrofit, Full & Partial Depth Repair, Joint and Crack Resealing
Structural/Material Issues
Progressive Concrete Pavement Preservation Strategy Improves City Streets in Minneapolis
A Progressive Concrete Pavement Preservation Strategy Improves City Streets in Minneapolis
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City/Municipal
Cross/Slot Stitching, Diamond Grinding, Dowel Bar Retrofit, Full & Partial Depth Repair, Joint and Crack Resealing, Slab Stabilization
Friction/Safety, Sustainability/Environmental
Quick Facts: Pavement Base and Subgrade Repair
Pavement base and subgrade repair reduce pavement deflection by filling subsurface voids
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Airport/Airfield, City/Municipal, Highway, Industrial, Race Track
Slab Stabilization
Structural/Material Issues