Construction World April 2016

NMC Construction Namibia was awarded the contract to apply SikaWater- bars, SikaSwell S-2, SikaPrimer-3N and Sikasil-Pool. The waterproofing process commenced with the application of SikaSwell S-2 to the 60 m of construction joints on the floor of the pool. Highly economical and easy to apply, SikaSwell S-2 is a one-part polyurethane waterstop that swells in contact with water. It provides permanent water resistance and its optimised expansion rate prevents damage to fresh concrete during curing. Sika Waterbar Type O-20 was used as a centrally placed waterbar in all the expansion joints. Manufactured from virgin thermoplastic PVC for easy, on-site welding, internationally tested Sika-Waterbars are used to seal construction and expansion joints in all water retaining structures. They are designed to withstand high water pressure and are supplied in rolls of various widths and types. Sika Waterbar Type DR-20 was placed in the external wall joints of the pool while the 135 m pool perimeter, between the wall and floor, was sealed with SikaSwell S-2. All expansion joints were subsequently primed with SikaPrimer-3N, a one component, epoxy-polyurethane solvent-based primer for porous substrates. Suitable for use on matt-moist substrates, it is easy to apply and provides good wetting out properties. To complete the waterproofing process, Sikasil-Pool, a one-part, neutral curing silicone sealant especially designed for swimming pools and any permanently wet areas, was applied to the joints. Sikasil-Pool is highly resistant to chlorine and fungal attack; it also provides excellent weathering and UV resistance. Its elasticity and flexibility provide high tear resistance. To complement the many luxurious finishes at Marula Game Ranch, including Oggie oak flooring and suede paint on the walls, the swimming pool was completed with a layer of granite tiling. With more than 7000 species of wildlife roaming its vast lands, Marula Game Ranch is destined to become a top tourist attraction in Namibia and Sika is proud to have been part of its construction. NAMIBIAN WATERPROOFING When a Russian billionaire with a passion for nature and wildlife recently purchased almost 30 000 ha of land in Namibia, it resulted in the construction of the luxury Marula Game Ranch. It was here, 80 km southeast of Windhoek in the Khomas region, that RBL Architects specified several of Sika’s high performance waterproofing products for the lodge’s one million-litre swimming pool. >

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CONSTRUCTION WORLD APRIL 2016