Spalled Joints & Cracks
If you have spalled joints and cracks, you need to perform:
Partial Depth Patch Repairs
Partial depth repair (PDR) is a shallow depth repair procedure used to address pavement deterioration that does not fully extend through a concrete slab. This method is used to repair spalling and fraying of concrete slab edges at joints and cracks as well as localized scaling. Spalling, which can occur on both jointed and continuously reinforced pavements, reduces pavement serviceability and can become hazardous to highway users. This type of deterioration can be caused by a number of factors including late sawing, poor joint design, inadequate joint/crack maintenance and material durability issues such as Alkali-Silica Reactivity (ASR). Once initiated, spalls tend to grow under repeated thermal stresses and traffic loadings.
The purpose of PDR is to repair surface defects, reestablish joint reservoirs and restore localized areas of deterioration. PDR replaces unsound concrete to restore rideability and discourages further deterioration. Further, PDR is an excellent preventative maintenance technique as it is proven to last more than 20 years when properly constructed using quality materials and workmanship.
Resources
Guide for Partial Depth Repair (PDR) of Concrete Pavements
This guide is from the National Concrete Pavement Technology Center regarding Partial Depth Repairs (PDR). Partial-depth repairs are defined as the removal and replacement of small areas of deteriorated (or spalled) concrete pavement. Partial-depth repairs slow or eliminate the spread of spalling distresses that tend to occur under repeated thermal stresses, freezing and thawing, and traffic loading.
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Technical Info
Airport/Airfield, Bridge, City/Municipal, Highway, Industrial, Race Track
Full & Partial Depth Repair
Structural/Material Issues
Calcium Sulfoaluminate (CSA) Cement
Calcium Sulfoaluminate (CSA) cement is an advanced cementitious material known for its fast setting, high early strength, low shrinkage, long-term durability and low carbon footprint. CSA is increasingly recognized as a vital component in modern construction due to its significant benefits that align with the industry’s evolving goals of sustainability, efficiency and innovation. CSA cement aligns with the construction industry’s goals by offering a sustainable alternative that meets the demands for efficiency and high performance. Its unique properties enable innovative applications in areas such as rapid repair, pushing the boundaries of traditional construction methods.
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Fact Sheet
Airport/Airfield, Bridge, City/Municipal, Highway, Industrial, Race Track
Concrete Pavement Preservation and Restoration, Dowel Bar Retrofit, Full & Partial Depth Repair
Structural/Material Issues, Sustainability/Environmental
Minnesota State Aid Concrete Pavement Rehabilitation Best Practices Manual
This manual has been developed, with permission, from information published by the Minnesota Department of Transportation (MnDOT) and the American Concrete Pavement Association’s Concrete Pavement Repair Manual, which was printed in May 2003. It includes joint repair, partial-depth repair (PDR), full-depth repair (FDR) and dowel bar retrofit (DBR).
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Bridge, City/Municipal, Highway
Concrete Pavement Preservation and Restoration
Structural/Material Issues
Dowel Bar Retrofitting in Buena Vista County, Iowa
In Buena Vista County, Iowa, a study sponsored by the Iowa Highway Research Board and Iowa Department of Transportation evaluated different dowel bar materials for local road pavements. The project, conducted by Iowa State University, included diamond grinding to improve the international roughness index and reduce faulting. The findings indicated that fiber-reinforced polymer (FRP) dowels performed better in terms of pavement smoothness compared to steel dowels.
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City/Municipal
Dowel Bar Retrofit
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An Evaluation of Retrofit Load Transfer Materials and Dowel Bar Configurations
The Minnesota Department of Transportation (Mn/DOT) constructed experimental test sections of retrofit load transfer and DBR on U. S. Highway 52, a divided 4-lane highway near Zumbrota, Minnesota that was originally constructed in 1983. Multiple dowel bar configurations were evaluated.
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City/Municipal, Highway
Dowel Bar Retrofit
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Evaluation of Dowel Bar Retrofits for Local Road Pavements
The Buena Vista County staff developed a construction project to retrofit the dowels in the joints and grind the surface of the test pavement. The contract included items for the preparation and the installation of dowels in each of the transverse joints in the pavement. After a careful analysis of the dowel bar retrofit (DBR) sections, the conclusion was made that FRP bars maintain a better IRI. However, this comes at a higher cost.
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City/Municipal
Dowel Bar Retrofit
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