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SpecChem RepCon V/O

SpecChem RepCon V/O

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Single component polymer-modified concrete repair mortar with corrosion inhibitor

RepCon V/O is a high-performance, single-component, polymer-modified, fiber-reinforced concrete repair mortar, enhanced with an integral corrosion inhibitor. Designed for versatility, it’s suitable for horizontal, vertical, and overhead applications. Utilizing advanced polymer technology, RepCon V/O provides exceptional durability and ease of use in industrial, commercial, and infrastructure (DOT) settings.

  • Simple one-component system, just add water.
  • Employs dry polymer technology for superior freeze-thaw durability.
  • Can be hand-applied or spray-applied, accommodating large projects.
  • Offers an easy-to-apply consistency for up to 2-inch thick applications.
  • Cures to a concrete-gray color.
  • Specifically formulated for vertical and overhead repairs.
  • Fiber-reinforced to enhance strength.
  • Contains an integral corrosion inhibitor to protect rebar and extend the life of the repair.
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Application

Surface Preparation

  • Cleaning the Surface:Ensure the concrete is sound, and free from oil, grease, dust, laitance, or other contaminants. Saw cut the perimeter of the repair area 1/8” deeper than the repair depth to create a notched, reinforced edge.
  • Abrasive Preparation:Mechanically abrade the surface to a minimum Concrete Surface Profile (CSP) of 5, in line with ICRI 310.2 guidelines. All concrete surfaces must be saturated-surface-damp (SSD) with no standing water present.
  • Steel Reinforcement Treatment:Clean all exposed steel reinforcement of rust and coat with SpecPrep SB. Apply a spray or brush coat of SpecPrep SB to SSD concrete, proceeding with the repair mortar application wet on wet or within the recommended open time as per the SpecPrep SB datasheet.

Mixing and Application

  • Mixing Procedure:Mix 6.25 to 6.75 pints of clean water per 50 lb bag of RepCon® V/O, adjusting for desired consistency. Use a low-speed drill for mixing, starting with water then gradually adding the RepCon® V/O. Mix for 2 to 3 minutes until homogenous.
  • Application Instructions:For placement, trowel RepCon® V/O firmly into the prepared area ensuring full contact with the bonding surface. Overfill slightly and shape roughly during placement.
  • Shaping:After the initial set when RepCon® V/O is surface hard, shave the material to the final shape using a steel trowel. The maximum depth of neat repair mortar is 2” per lift; additional lifts can be applied after the initial set ensuring the original lift has a rough surface to enhance bond between lifts.

Finishing and Curing

  • Finishing:Finish the repair material to match the surrounding concrete texture. RepCon® V/O is self-curing under most conditions but in severe drying conditions, an ASTM C309 compliant water-based SpecChem curing compound should be used.
  • Curing:Moist curing is recommended immediately after finishing and should continue for 48 hours. Protect newly applied material from rain, sun, and wind until compressive strength is 70% of the 28-day strength. Cover with insulating material to prevent freezing. Setting time is dependent on temperature and humidity.

Shelf Life

Unopened packages can be stored for up to 12 months in dry conditions. Store away from direct sunlight in a cool, dry location.

Test Data

  • Set Times (ASTM C266):Initial set: 50 minutes, Final set: 90 minutes at 70°F.
  • Compressive Strength (ASTM C109):1 Day: 3650 psi28 Days: 7450 psi
  • Bond Strength (ASTM C882, 7 Days):2185 psi
  • Flexural Strength (ASTM C348):7 Days: 650 psi28 Days: 1210 psi
  • Length Change (ASTM C157):Minimal under both wet and air cure conditions
  • Freeze-Thaw Resistance (ASTM C666):Relative Durability Factor of 95.7 at 28 days
  • Rapid Chloride Permeability (ASTM C1202, 28 Days):890 coulombs
  • Modulus of Elasticity:4.8 x 106psi