Roklin's VariFlo machine is a polymer-dispensing machine designed for the quick and easy large-volume repair of damaged concrete and asphalt.

1. Presents

2. The VariFlo
Polymer Dispensing
Machine

4. Maker of Concrete and Asphalt
Repair Products

5. History
Roklin was incorporated in 2001 after acquiring products and
formulas from a previous company.
Roklin’s approach to concrete and asphalt repair originated in the
early 1980’s with a project to quickly repair bomb-damaged military
runways at 33 European NATO bases. The Pavement Research Center
at Florida’s Tyndall Air Force Base initiated this program to evaluate
suitable technologies.
The primary requirement for materials was to complete the repair
in less than 30 minutes so that it would hold up for takeoff and
landing of a fully-loaded NATO bomber. The most effective material
tested was a rapidly-curing polyurethane elastomer, which provided
the necessary speed, bond strength, and load bearing properties.

6. Today
The requirements for concrete repair have changed little since then. Currently
Roklin provides multiple options for concrete and asphalt repair.
After nearly 12 years, Roklin has sold products in every state and more than 15
countries. Roklin offers a wide-range of solutions from Concrete Welder in 21
oz. cartridges for small crack repairs to full-depth concrete slab stabilization
using the 100-gallon VariFlo 15-50.
Today’s presentation will focus on the VariFlo Polymer Dispenser and its
benefits over conventional repair methods.

7. VariFlo Polymer Dispenser

8. VariFlo Polymer Dispenser

9. VariFlo Polymer Dispenser

10. VariFlo Polymer Dispenser Gun

11. Concrete Welder
• Two-component polyurethane systems designed to support heavy
traffic loads
• Flexible enough to minimize bond stresses and thermal stresses
• Low-viscosity ensures deep penetration to counter Hydraulic
pumping action
• Rapidly-setting for quick return to traffic

12. Concrete Welder
• Fills voids to extend life-expectancy of concrete
• Restore aggregate interlock for better load transfer and slab
stabilization
• Seals from beneath slab to protect from groundwater penetration
• Topical application allows for grade restoration with no demolition
or removal of material

13. Concrete Welder
• 1-to-1 ratio of application ensures consistent mix every time
• Simplified delivery method means less breakdown and downtime
• Minimal prep and no demolition or removal significantly reduces
labor requirements
• Reduced repair times allow for faster return to traffic with minimal
interruption and safer work environment

15. The Process
• Use compressed air or leaf-blower to blow out any loose debris
• Inspect for moisture, if moisture is present, use propane torch to
dry, remember the cleaner and dryer the surface, the better the bond
• Primer is not required as the porosity of the aggregate dictates the
strength of the bond. Concrete Welder is designed to be adsorbed
into the concrete and its absorption allows it to act as its own primer

17. The Process
• Start the VariFlo machine and check for two consistent streams of
polymer from the manifold head
• Attach the static mixer and hand-tighten the retaining nut
• Place the static mixer into a small bucket, run the machine and
when the delivered polymer is fully mixed the machine is ready

18. VariFlo Polymer Dispenser

19. The Process
• Place the static mixer nozzle into the crack and engage the motor
• Allow the low-viscosity material to flow freely to the base of the
repair
• Two-minute reactivity allows for material to travel to the base of
the repair, react and create a back-fill point

21. The Process
• Now the polymer will flood the voids and present at the surface
• At this point we wait to see if the polymer will dissipate, if it
does, introduce more polymer until the flow stops
• Now you are able to restore structure where it was absent in a
sunken slab by pre-placing aggregate to just-below grade

23. The Process
• By utilizing the heavily-compacted damaged concrete we eliminate
the need for removal and replacement, ensuring a fast repair
• We require 3/8 inch pea gravel combined with a 16-mesh sand
• These aggregates can be locally-sourced as long as they are clean
and dry

25. The Process
• Flood the pre-placed aggregate with polymer
• Broadcast Topping sand to refusal
• Check for low spots and apply more polymer if needed

27. The Process
Finally, sweep or blow off excess sand, remove cones and return to traffic

28. Benefits
• Minimum prep reduces labor costs significantly
• Repair time is counted in minutes not hours
• Quick set allows for quicker return of traffic
• Flexibility enables longer-lasting repairs, especially in thermal contraction and
expansion cycles
• Safe to use, no VOC’s and closed-delivery system eliminates exposure concerns
• Seals and waterproofs concrete both from above and below the slab

29. Benefits
• Lasts longer than conventional repair materials
• Can be applied over a wide temperature range
• Chemical Resistance to Oils, Hydraulic Fluids, Diesel
and Gasoline
• Grade restoration enhances smooth ride
• Enables effective load transfer from approaching slab
through repair
• Cost effective

30. Video
Need to supply video in different format – Powerpoint
won’t read MP4

32. FlexSet/FloMix