Issue link: http://digital.canadawide.com/i/1385297
J U N E 2 0 2 1 | 43 Waterproofing P H OTO G R A P H Y CO U RT E SY M A P EI Lafarge has had tremendous success using the admixture KIM to waterproof below-grade foundations, pits, retaining walls, and containment tanks, but Jameson's project collaborators decided to use the admixture for the above grade areas of the building, as the unfinished architectural concrete was a unique design finish that would be exposed to Vancouver's heavy rainfalls. Lafarge used approximately 13,440 kilograms of admixture, and combining it with Lafarge's Chronolia shortened the construction cycle. Of the new projects globally that demonstrate the effectiveness of Xypex Chemical Corp's concrete crystallization waterproofing technology, the recent Prague Sewer Protection project in the Czech Republic is noteworthy because in order to protect a new cast-in-place main drop shaft and a smaller (4.2-metre diameter) maintenance shaft, Xypex Concentrate reinforced by Xypex Modified was specified and used not only to waterproof but also give extra protection, due to the aggressive environment caused by sulphate and sulphuric acid. The products were applied primarily by sprayer over a four-day period, and specially-designed spray tools helped save two weeks of labour; 1,900 square metres were treated, protecting the two shafts from internal wastewater spray and external groundwater intrusion. In Canada, Mapei is heavily relied upon to provide waterproof- ing solutions to a diverse range of projects, from the restoration of Delta Hotels Ottawa City Centre (whose 50-year-old indoor swimming pool was leaking and required repair of the underlying concrete) to the TransEd Valley Line LRT twin tunnel project in Edmonton. For that $1.8-billion mass transit project, the City of Edmonton turned to Mapei's UTT team for water- proofing and concrete expertise. "A key product in Mapei's arsenal is its Mapelastic, a flexible, cementitious membrane for waterproofing and protecting concrete and masonry," says Pierre Courchesne, product line manager at Mapei Inc. "Mapelastic in Canada is being widely used in commercial, industrial, and civil applications. It can be applied to steel components and concrete to enable waterproofing to be achieved in a different way. In Italy, where the product originates, Mapelastic has been applied successfully for more than 30 years now." An early and lasting application of Mapelastic in Canada dates from 2013, when it was chosen for the eight-kilometre, 245,000-square foot Autoroute Dufferin-Montmorency in Québec City, to waterproof the elevated concrete structure, and protect it against chemical attack from de-icing salts, sulphates, chlorides, and carbon dioxide. It was also used on the newly renovated Viaduc Sud rail overpass, originally built in 1931 by CN to ferry passengers in and out of its Central Station in Montreal. Here, Mapelastic was applied in 2020 on the exte- rior concrete as part of a revitalization of the structure to prolong its useful life. Protective wall cladding is one of Durabond's specialties, ranging from non-combustible and pre-fabricated building systems to Continuous Insulation systems. The latter is a line of CCMC-approved, SB-10 and SB-12 compliant, moisture managed, exterior insulation and finishing systems that provide Pool restoration, Delta Hotels Ottawa City Centre, Ottawa, ON. Concrete Waterproofing by Crystallization XYPEX integral crystalline technology waterproofs concrete foundation structures as they're poured and cannot be damaged during installation or backfilling. Unlike membranes, Xypex is added to the concrete at the time of batching avoiding application errors. This sustainable technology also contributes to LEED credits. When you select Xypex Crystalline Technology, you've chosen the best… more than 40 years of independent testing, experience in over 80 countries, unmatched product and service standards … and still No Equal. Call 1.800.961.4477 or visit us at xypex.com Electron Microscope Images are the property and copyright of Xypex Chemical Corporation. Concrete (Untreated) Xypex Crystallization (Initiated) Xypex Crystallization (Mature)