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UW Grout Green Conscious Product

Underwater cementitious grout

UW Grout is a pumpable underwater cement-based nonshrink grout with integral corrosion inhibitor for use in underwater repair such as pile restoration. UW Grout is designed for underwater use in tidal zones in applications requiring a non-shrink, non-metallic, wash out resistant grout in thicknesses from 1/2” up to several inches. UW Grout is specially formulated for minimal wash-out and is salt-water resistant.

  • Free-flowing or pumpable consistency for easy application
  • High early and ultimate strength for fast repair and turn around without chlorides
  • Positive expansion for maximum durability and adhesion.
  • Contains integral corrosion inhibitor
  • “Wash-out” resistant thixotropic consistency for dependable underwater repairs (displaces water)
Tech Sheet
Safety Sheet
Spanish Tech Sheet

Application

UW Grout is recommended for:

  • Grouting of bridge columns, concrete pilings, and dam repairs.
  • Applications where a resistant, free-flowing, or pumpable non-shrink grout is required, especially in underwater settings.

Preparation and Application

  • Surface Preparation: The substrate must be clean and sound, with all loose material removed. Use sandblasting or high-pressure water jetting for surfaces permanently immersed in water.
  • Mixing: Use 7 to 7.5 pints of water per 50 lb bag to achieve a flowable consistency. Mix with a mechanically powered grout mixer and ensure continuous operation to prevent setting delays.
  • Placing: UW Grout can be dry-packed, poured, or pumped. Utilize a flexible tube for placement to ensure even distribution and to minimize water entrapment.

Curing and Limitations

  • No curing is required for applications submerged in water.
  • For above-water applications, cover with wet rags immediately after setting, followed by an ASTM C309-91 compliant curing compound.

Packaging

  • Available in 50 lb bags and 3000 lb super stacks.

Shelf Life

  • Store in a cool, dry place away from moisture. Properly stored, UW Grout has a shelf life of one year.

Test Data

  • Set Times at 70°F (ASTM C266):
    • Initial Set: 100 minutes
    • Final Set: 240 minutes
  • Compressive Strength (ASTM C109):
    • 1 day: 2500 psi
    • 7 days: 8050 psi
    • 28 days: 9100 psi
  • Expansion % (ASTM C1090):
    • Consistently 0.03% across 1, 7, and 28 days.

Standards

  • Complies with the Corps of Engineers CRD C621 for plastic and flowable conditions, and ASTM C1107.