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Concrete In Australia : June 2013
10 Concrete in Australia Vol 39 No 2 NEWS Silver Members Protecting a tower of investment Waterproo ng membrane has been speci ed for the concreting of the $240 million Tadawul Tower in Riyadh, Saudi Arabia -- a new headquarters for the Saudi stock exchange. Designed by Japanese architects Nikken Sekkei, managed by UK-based Mace Group and built by Samsung, the Tadawul Tower will be one of the nal projects to be completed as part of the redevelopment of Riyadh s King Abdullah Financial District. When completed in 2014, the 40-storey tower will cover a total area of 140,000m2. e 400m-tall building required a high performance membrane to provide fully bonded waterproo ng, zero water tracking and exceptional concrete protection. With low environmental impact and long term performance paramount, as well as the extreme climate to consider -- where daytime temperatures regularly top 40°C -- Grace Construction Products Preprufe was chosen. Designed with synthetic adhesive layers combined with a HDPE lm, Grace Construction Products said Preprufe provides a permanent physical barrier that will protect each structure against chloride and sulphate attack. e product s patented Advanced Bond Technology enables concrete to aggressively adhere to Preprufe, forming a unique seal, which prevents any water migration between the waterproo ng and the structure and substantially reduces the risk of leaks. Grace also said Preprufe can be applied on wet substrates and is immediately tra cable a er installation without protective layers, which made for fast application, achieving rates up to 500m2 laid in one day.