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FEBRUA RY 2017 | 15 Restoration Products & Services P Specialized restoration products and services continue to preserve Canada's heritage by ROBIN BRUNET Perhaps because restoration encompasses so many facets of infrastructure and includes product manu- facturers as well as the restorers themselves, activity in this broad sector is white hot. Companies such as Mapei are keeping busy from coast to coast. Diane Choate, corporate communica- tions specialist for Florida-based Mapei Inc. says: "We continue to be involved in a wide variety of projects across Canada, many of them involving structural strengthening of concrete buildings and infrastruc- ture, plus restoration with repair mortars, grouts and elastomeric coatings for concrete and masonry repair." Some of Mapei's more notable projects include the Scotiabank Conference Centre at Scotia Plaza in Toronto, which required structural strengthening beams in the ceiling of the garage level, the concourse level and the main floor. On the second floor, a new con- crete surface was poured over corrugated steel plates to cover the open atrium and provide extra space for the conference centre. Mapei's carbon-fibre-reinforced-polymer (CFRP) composite systems were used in the two phases of the project. For the structural strengthening work, Carboplate E 250, an ultra-strong custom carbon fibre typically used in the aeronautical industry, was applied Architectural Conservation high-performance concrete (HPC) on overpass repairs at 16th Avenue NW above Crowchild Trail. The prod- uct's flexibility and wet-cure time were some of the many benefits of using this product. Sacrificial galvanic anodes is one of many tools The Euclid Chemical Company relies on for effective infrastructure restoration. Euclid has been developing repair, waterproofing and concrete additive products for over 100 years, and Brian Salazar, Euclid Canada's national business development manager, cites a two- level parkade in a Toronto office building as a typical example of where sacrificial anodes and repair prod- ucts are required. "The 40-year-old building's parkade was a waffle slab construction badly corroded with chlorides. If we had merely cut out the corroded steel and delaminated concrete portions of the slabs and poured new con- crete, the reinforcing steel adjacent to the repair would become corroded in as little as two years due to the anode ring effect. But by inserting Sentinel Galvanic Anodes on the rebar in the repair area before pouring the new concrete, the Sentinel anode's self-generating current actually slows corrosion for as long as 10 to 15 years," Salazar says. Essentially, the zinc in each Sentinel anode gener- ates a current to the surrounding reinforcing steel, thus protecting the steel from further corrosion. For the Toronto parkade, 1,800 anodes were required, spaced appropriately for optimum current distribution. In a similar vein, Fibrwrap Construction has per- formed countless concrete restoration projects and is expert in the practice and application of repair prin- ciples, from epoxy injection of 1⁄₁₆-inch cracks to full depth repairs including splicing of new bar. What Fibrwrap Construction offers beyond the scope of many concrete repair contractors is an engineered approach to the restoration, with analysis of the root cause of the degradation or corrosion. This has enabled the company to work on projects as complex as nuclear structural protection. Augmenting this expertise is the Tyfo concrete repair system by Fyfe Company, a compre- hensive line ranging from corrosion inhibitors to polymer modified concrete, and the Tyfo Fibrwrap system, which protects and prolongs the life of the concrete restoration. On the residential and commercial side of the res- toration sector, spray foam is universally acknowl- edged as an effective insulation/air barrier, and as Paul on the horizontal overhead surfaces of support beams, with MapeWrap 11 as the bonding agent. On the main floor, Carboplate E 200 was used on the horizontal overhead surfaces of the beams sup- porting the second floor, and on the second floor itself, 7,000 metres of Carboplate E 200 was applied with MapeWrap 11 and MapeWrap Primer 1 in a side-by- side layout. This degree of strengthening was neces- sary due to the large number of attendees and their equipment that would fill the conference centre dur- ing conventions and meetings. Mapei's concrete restoration products have also been used to support overpass beams and restore poured concrete. Planitop 23 repair mortar was selected to repair the interchange on Autoroutes 640 and 15 in Boisbriand, Quebec. Because it matched the existing concrete, and a full truckload of Planigrout 712 (1,120 bags per truckload) was required to complete the needed constructions and repairs. In Calgary, Planitop 15 form-and-pour, one-component repair mortar was selected as an alternative to using Euclid Admixtures' Sentinel Galvanic Anodes in action. Structural strengthening with Mapei's Carboplate E 250 at the Scotia Plaza, Toronto, ON. The Dominion Public Building – now the Paul Martin Building – in Windsor, ON nearing completion in 1933. ARCHIVAL PHOTOGRAPHY COURTESY COLONIAL BUILDING RESTORATION

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