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SpecChem RepCon H

SpecChem RepCon H

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Contractor Overview

RepCon H is a cementitious concrete repair mortar. Single-component polymer-modified concrete repair mortar with corrosion inhibitor RepCon® H is a single-component, polymer-modified, fiber-reinforced concrete repair mortar with an integral corrosion inhibitor. It is ideal for various horizontal repair applications including form/pour, screed, or trowel down methods.

Best For

  • Vertical
  • Horizontal

Key Features

  • Fiber-reinforced concrete repair mortar with an integral corrosion inhibitor
  • Fiber-reinforced for added strength
  • One-component, just add water
  • Corrosion inhibitor RepCon® H is a single-component, polymer-modified, fiber-reinforced concrete repair mortar with an integral corrosion inhibitor
  • Corrosion inhibitor

Material & Application Notes

It is ideal for various horizontal repair applications including form/pour, screed, or trowel down methods. Utilizing the latest polymer technology, RepCon® H offers superior durability, performance, and ease of application in industrial, commercial, and infrastructure settings. One-component, just add water.

Why Contractors Choose It

Contractors choose RepCon H when the repair needs to hold up, finish cleanly, and fit the job condition without slowing down the crew.

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Application

Surface Preparation:

Ensure the concrete is sound and free of foreign materials such as oil, grease, dust, and laitance. For enhanced durability, saw cut the repair perimeter 1/8” deeper than the repair depth to create a notched, reinforced edge. Mechanically abrade the surface to a minimum CSP 5 according to the ICRI 310.2 guideline. Ensure all surfaces are saturated-surface-damp (SSD) with no standing water.

Priming/Scrub Coat:

Remove rust from all exposed steel reinforcing and coat with SpecPrep SB. Ensure the concrete is SSD and primed with SpecPrep SB, applying the repair mortar wet-on-wet or within the recommended open time. Alternatively, scrub a thin layer of the mixed mortar into the pre-dampened substrate using a stiff brush and apply the mortar before the bond coat dries.

Mixing:

Add 4.5 to 5.0 pints of clean water per 50-pound bag of material, depending on the desired consistency. Mix using a low-speed drill, adding water first, then the RepCon® H powder, and mix for 3 minutes. Only mix what can be applied within the setting period. RepCon® H is suitable for applications from 1/4″ to 2″ per lift.

Deep Applications:

For repairs exceeding 2″, extend RepCon® H with clean, SSD, 3/8” aggregate up to 60% by weight (30 lbs) and mix for an additional 2 minutes. This extension will increase the yield by approximately 0.17 cubic feet and should be placed within 20-30 minutes.

Placement and Curing:

  • Placement:Trowel or screed RepCon® H into the prepared area, ensuring thorough contact with the bonding surface. Allow to reach initial set, then finish by hand troweling.
  • Finishing/Curing:Achieve the desired texture to match surrounding concrete without adding water to the surface. Use SpecFilm as a finishing aid. Under most conditions, RepCon® H is self-curing. In severe drying conditions, use an ASTM C309 compliant water-based SpecChem curing compound.

Packaging

50 lb bags, covering approximately 20 sq-ft at 1/4″ thickness.

Shelf Life

12 months when stored in a dry facility away from direct sunlight.

Test Data

  • Set Time at 70°F (ASTM C266):Initial Set: 50 min, Final Set: 75 min

Compressive Strength (ASTM C109):

  • 1 day: 4250 psi
  • 7 days: 6000 psi
  • 28 days: 9000 psi

Bond Strength (7 days, ASTM C882 modified):

  • 2895 psi

Flexural Strength (ASTM C348):

  • 7 days: 650 psi
  • 28 days: 1200 psi