Structural Repairs

Fiber Reinforced Polymer Strengthening (FRP)

  • Fiber Reinforced Polymer Systems (FRP) are an excellent option to add structural capacity to existing concrete members. FRP systems are comprised of fiberglass or carbon fiber (CFRP) fabrics that are saturated in epoxy resin for bonding and applied directly to the surfaces of deficient members. After curing, the original concrete member and FRP system have bonded to become a new composite section. DanKel has partnered with industry leading FRP manufactures and can provide projects with a turn key design to installation solution.
  • Benefits to FRP
    • CFRP is excellent option for adding flexural or shear strength
    • CFRP can be used for column confinement or armoring.
    • Inexpensive in comparison to replacement or traditional strengthening methods
    • Lightweight, high strength to weight ratio.
    • Corrosion Resistant
  • FRP Applications
    • Repair of damaged or corroded concrete structures
    • Increase load capacity to existing structures to meet more stringent design standards
    • Seismic Retrofit
    • Concrete Column or Pile Jacketing

Epoxy Crack Injection

  • Epoxy crack injection is effective method to restore structural integrity and moisture resistance compromised concrete members. Before proceeding with any crack repair, the cause of the crack and need for structural repair must be determined before selecting a crack repair method. DanKel’s experienced team can complete field inspections to determine the root cause of cracks to select an appropriate product and method for the repair. If a structure requires special attention, DanKel can assist with sourcing and managing a structural engineer to complete further analysis.
  • Crack Injection Advantages
    • Low viscosity, high strength injection epoxies are able to bond or weld cracked concrete to a like new condition
    • Epoxy crack injection is very cost effective when compared to replacement.
    • Cracks determined to be non-structural can be repaired with partial depth injection or flood coated products to prevent moisture intrusion.
    • Injection ports are primarily surface mounted and are ground flush with existing concrete after repairs are made.

Polyurethane Injection/Grouting

  • Concrete structures that are below grade are often plagued with moisture intrusion at cracks and joints. DanKel can inject hydrophobic (water activated) polyurethane grouts into cracks and joints to stop the flow of water without requiring major excavation. DanKel uses environmentally friendly polyurethane grouts that are safe to be in contact with drinking water.
  • Applications for Polyurethane Injection
    • Box culvert and drainage structure repair
    • Water Treatment plants
    • Fill for underground voids or cavities
    • Stabilization for compromised soils

Concrete Spall Repair

  • Concrete structures are susceptible to spalling and delamination that expose critical reinforcing steel to corrosion. DanKel can strategically remove unsound concrete and repair using a variety of specialized repair mortars to restore the original integrity and aesthetics to the bridge, building, or box culvert.
  • Repair Techniques:
    • Hand Patching
    • Form and Pour
    • Vertical and Overhead
    • Thin Overlay Resurfacing

Expansion Joint Replacement & Installation

  • Concrete structures utilize expansion joint systems for seasonal expansion/contraction and a path for movement as the structure flexes under load. Expansion joints systems are the first line of protection to water infiltration. When they malfunction, critical structural members can be prematurely corroded. Seized or damaged expansion joints can prevent movement and apply adverse loads to adjacent structural members resulting in permanent damage requiring repair. DanKel can evaluate the

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