February 2020

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EucoRepair SCC one component, self-consolidating repair mortar from Euclid Admixtures. Application of Polyurethane-Methacrylate (PUMA) resin by RJC at the Calgary International Airport. Restored parking ramp, Calgary International Airport. Dur-A-Fast Balcony Waterproofing System from Durabond Products Ltd. F E B R U A R Y 2 0 2 0 | 11 Till says, "The real-time strength data enables users to better understand their concrete and more accurately understand when formwork removal, tensioning, and loading can be done. This results in the ability to make better decisions that can allow efficiency improvements. In fact, Maturix can send alerts in real-time on when target strength has been achieved, or when temperature differential is a con- cern. It has many benefits over current construction practices and can not only save contractors time, and money, but it will allow them to build better." Indeed, the ability to monitor concrete is one of the major breakthroughs in restoration products and services overall. Brian Salazar, national busi- ness development manager at Euclid Canada, says the use of the Sentinel Galvanic Anodes available through his company "are becoming more popular because they don't have huge upfront costs and they have been proven to delay repair cycles." Specifically, these zinc-filled anodes are used in locations where new concrete or concrete repair materials are placed adjacent to existing chloride-con- taminated concrete, and they mitigate the corrosion of reinforcing steel in concrete by generating cur- rent to the steel. The Sentinel anodes are specifically engineered for easy, efficient placement on any size of reinforcing bar: for example, they can be attached to the side of the reinforcing bar, thus minimizing concrete removal beneath the rebar. This design fea- ture reduces labour requirements dramatically. Euclid Canada is a significant source of concrete restoration products, including EucoRepair SCC, a one component, self-consolidating repair mortar that is shrinkage-compensated, polymer and micro- fibre modified, and contains an integral corrosion inhibitor. It is designed for horizontal and formed vertical/overhead structural repairs in applications from 2.5 centimetres to full depth. "This mortar is great for joint repairs, floor toppings, pavements, beams, and vertical or overhead form and pour repairs," says Salazar. With regards to restoration solutions that address Canada's severe climate, Anthony Rapone, man- ager at Durabond Products Ltd., points out that Polyurethane Modified Methyl-Methacrylate based coatings (PMMAs), "are excellent for extreme dura- bility, rapid turnaround, and cold temperature applications. They are great for restoration and repair work to traffic coatings in limited access/ timeline areas, and typical applications include entrances to parking decks or where areas are tight and there is no place to do staged shutdown for parking deck coating repair." With Durex being Durabond's PMMA brand, the Durex Dur-A-Fast Extreme Traffic Bearing Waterproofing System features a primer, membrane, intermediate coat and top coat that together provides extreme abrasion resistance, withstands snow plow blades and service, and enables a return to service just one hour after the final coat is applied. Durex also offers a Dur-A-Fast Balcony Waterproofing System for high-traffic balconies, terraces, and walkways with the same four-step application and return to service time. Colvin at RJC cites PMMAs and Polyurethane- Methacrylate (PUMA) technology as great examples of products that are facilitating tricky restoration projects. "For the past year we've been involved in the restoration of a 1976 parkade at Calgary International Airport and a roadway linking it to the main terminal, both of which have seen their fair share of deterioration partly because the water- proofing available in the 1970s wasn't nearly as good as today's systems and also because of weather," he says. "We've already used PUMA manufactured by Sika to coat a rental car parking ramp as well as a spiral ramp with a steep decline, applied when the temperature was only five Celcius, and both struc- tures were returned to operation later that day." PUMA resins can be applied in temperatures as low as 0C and up to 30C, and they are about 90 percent more flexible than epoxies, which make them suitable for areas where natural concrete movement is prevalent. "Our restoration depart- ment will continue to consider specifying PMMAs and PUMAs in the future," says Colvin. Extreme weather in the form of hurricanes and floods cause billions of dollars of damage through- out North America, exacerbated by standard insulation products that soak up dirty flood water and can ruin building interiors. But Betsy Cosper, Restoration Products & Services (CPCQA) CANADIAN PRECAST CONCRETE QUALITY ASSURANCE CERTIFICATION PROGRAM PROGRAM (CPCQA) CANADIAN PRECAST CONCRETE QUALITY ASSURANCE CERTIFICATION PROGRAM (CPCQA) CANADIAN PRECAST CONCRETE QUALITY ASSURANCE CERTIFICATION PROGRAM

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