Presents

The VariFlo Polymer Dispensing

Machine

Maker of Concrete and Asphalt Repair Products

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.

TodayThe 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.

VariFlo Polymer Dispenser

VariFlo Polymer Dispenser

VariFlo Polymer Dispenser

VariFlo Polymer Dispenser Gun

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

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

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

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

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

VariFlo Polymer Dispenser

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

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

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

The Process

• Flood the pre-placed aggregate with polymer

• Broadcast Topping sand to refusal

• Check for low spots and apply more polymer if needed

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

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

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

Video

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

FlexSet/FloMix