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SUBSURFACE VOIDS

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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

CPP for City Streets: Smooth Pavements Last Longer!

Concrete pavements can achieve maximum longevity using strategic repair techniques. Today's urban streets have, in many cases, encountered 40 to 60 years of wear and tear. Concrete Pavement Preservation (CPP) is a series of engineered techniques to rehabilitate concrete pavement. It is a viable alternative to costly asphalt overlays. Basic CPP techniques include: slab stabilization, full depth repair, partial depth repair, dowel bar retrofit, cross-stitching longitudinal cracks or joints, diamond grinding, joint resealing and crack resealing.

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City/Municipal

Concrete Pavement Preservation and Restoration

Smoothness, Structural/Material Issues, Sustainability/Environmental

Pavement Base and Subgrade Repair: Fill Subsurface Voids and Reduce Pavement Deflection

Pavement base and subgrade repairs are a vital tool in the Concrete Pavement Preservation (CPP) Toolbox. Subgrade repair comes in several forms, including slab stabilization (aka undersealing and subsealing), slab jacking, and medium and deep injection grouting. The best time to perform subsurface restoration is soon after loss of support is detected.

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

Slab Stabilization

Structural/Material Issues

CPR: Rebuilt to Last: Salt Lake City Concrete Pavement Restoration

In downtown Salt Lake City, Industrial Road at California Avenue required repair. The methods chosen were soil foundation stabilization, slabjacking, slab replacement, stitch-in-time crack repair, dowel bar retrofit (DBR), diamond grinding and joint resealing. The combination of using high density expansive polymers in conjunction with other concrete pavement preservation techniques including dowel bar retrofit and diamond grinding should extend the life of this pavement for approximately 15-20 years.

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Industrial

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

Structural/Material Issues

CPR: Rebuilt to Last: A progressive concrete pavement preservation strategy improves city streets in Minneapolis

City streets in Minneapolis benefited from the implementation of concrete pavement preservation (CPP) techniques. The strategy focused on rehabilitating structurally sound residential streets using methods such as diamond grinding, dowel bar retrofit (DBR), full depth repair (FDR), partial depth repair (PDR), cross/slot stitching, joint resealing, and crack resealing. This approach was chosen for its sustainability and cost-effectiveness, enhancing road safety and extending pavement lifespan by up to 25 years.

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City/Municipal

Concrete Pavement Preservation and Restoration

Sustainability/Environmental

CPR: Rebuilt to Last: Interstate 15, Ogden, UT

In 2013, the Utah Department of Transportation (UDOT) began concrete rehabilitation on a 15-mile stretch of Interstate 15 in Ogden, UT. Concrete Pavement Preservation (CPP) methods selected for the project included partial and full panel patching, slab jacking, resealing, dowel bar retrofit (DBR) and diamond grinding. UDOT provided a safe, smooth ride while reducing costs.

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Highway

Diamond Grinding, Dowel Bar Retrofit

Structural/Material Issues

CPR: Rebuilt to Last: Barlow Road & Gateway Avenue rehabilitation, Fort Morgan, CO

Barlow Road & Gateway Avenue in Fort Morgan, Colorado, were rehabilitated using slab stabilization, diamond grinding and joint resealing to prevent water ingress. Slab stabilization addressed pavement distress, and diamond grinding enhanced surface smoothness. These techniques proved effective for long-term use. The nondestructive methods used, including the injection of expanding structural polymer, eliminated the need for pavement removal, saving time and money.

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Industrial

Diamond Grinding, Joint and Crack Resealing, Slab Stabilization

Smoothness

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