Severely Cracked Slabs
If you have severely cracked slabs, you need to perform:
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Full-Depth Repairs
Full-depth repair is the removal and replacement of full slab thickness sections of deteriorated pavement. Length can vary based on conditions present. A common minimum patch size is four to six feet long and a full lane width wide. This type of repair can be completed on both jointed and continuously reinforced concrete pavement. On jointed pavement, the transverse construction joints at the patch ends are typically doweled and/or tied to restore load transfer across the joints. Additionally, on longer patch sections, dowel bar assemblies are placed at intervals to coincide with the existing transverse joint pattern present. On continuously reinforced concrete, the reinforcing steel pattern of the existing pavement is removed and replaced with new steel within the repair section. The transverse repair boundaries are first sawed and jackhammered to expose approximately two feet (typical) of the existing steel to facilitate the tying of the new reinforcement bars to the steel pattern in the existing pavement.
Resources
Concrete Repair Best Practices
Concrete pavement restoration (CPR) techniques have gained greater national significance as DOT agencies attempt to further extend infrastructure service lives prior to required major rehabilitation or reconstruction. This report consolidates best practice case studies for six CPR techniques: cross stitching, dowel bar retrofit, diamond grinding, full depth repair, partial depth repair and slab stabilization.
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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
MoDOT Full Depth Repair (FDR) Case Study
Full depth repair (FDR) is a well-established technique applied to existing jointed plain and jointed reinforced concrete pavements (JPCP and JRCP) that includes both partial slab replacement and full slab replacement to address any variety of serious distress. FDR provides for the long-term repair of structurally and/or functionally deteriorated joints, working cracks, shattered slabs, and multiple slab distress.
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Airport/Airfield, Bridge, City/Municipal, Highway, Industrial
Full & Partial Depth Repair
Structural/Material Issues
Jointed Full Depth Repair of Continuously Reinforced Concrete Pavements
FHWA ACPT products program tech brief describes both conventional methods and an alternative method for making full-depth repairs (FDR) in continuously reinforced concrete pavements. The alternative method, which does not utilize continuous longitudinal reinforcement in the repair area, is suitable for repairing a single lane (or two of three adjacent lanes), and results in repair areas that have performed well after several years.
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Highway
Full & Partial Depth Repair
Structural/Material Issues
CPR Built to Last: A Progressive Concrete Pavement Preservation Strategy Improves City Streets in Minneapolis
Concrete Pavement Preservation (CPP) has long been used on deteriorated highways, but it also offers an alternative to asphalt overlays when rehabilitating city streets constructed of concrete. Techniques include: Slab stabilization, Full-depth repair (FDR), Partial-depth repair (PDR), Dowel bar retrofit (DBR), Cross-stitching longitudinal cracks or joints, Conventional diamond grinding (CDG) and Joint and crack resealing.
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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
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
Full Depth Repair (FDR): Full-Depth Repair Restores Rideability By Fixing Localized Areas of Severe Distress
Full-depth repair (FDR) is a vital tool in the concrete pavement preservation toolbox. Joint deterioration (i.e., cracking, breaking or spalling at edges, where edges are defined by longitudinal or transverse joints) is a common form of distress requiring full-depth repair. Other distresses requiring FDR can include blowups, corner breaks, isolated concrete durability issues or severe random cracking.
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Airport/Airfield, Bridge, City/Municipal, Highway, Industrial, Race Track
Full & Partial Depth Repair
Structural/Material Issues