CoatingsPro Magazine

JAN 2019

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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POLYUREA WASTEWATER/WATER CONCRETE T Feature 70 JANUARY 2019 COATINGSPROMAG.COM BY STEPHANIE MARIE CHIZIK PHOTOS COURTESY INTEGRAL TECHNOLOGY CO., LTD. Concrete Crew Lining Taiwan Reservoir T he glass is half full for the Integral Technology coatings crew out of Taiwan, as a 2,000-person team is completing the lining of the new Nanhua Reservoir's desalinating tunnel. e project, which had been slated to end in June 2019, began many months earlier in December 2016. It takes an enormous number of steps to get water from the source to the faucet for a glassful of clean drinking water. e journey is no different at this reservoir, which is located on the Houku River on the south side of the island. But to get there, the Integral Technology crew has had to overcome a few hiccups (that water might help!). With the Nanhua Reservoir, and the dam that sits on its edge, one step in particular needed some clarity — quite liter- ally — with the help of the local coatings crew. e reservoir's dam holds water that runs in the Central Mountain Range through the system. is water contains sediment that needs to be filtered out, and to clear it out, a desalinating tunnel needs to be used. "e sediment issue drove the entire project investment," explained Michael Osborne, president of Nukote Coating Systems International, which supplied the lining materials for the job. "Reduction of dredging costs and maintaining the reser- voir's holding capacity were the key drivers for the project. is particular elastomeric system was specified for two primary reasons: waterproofing performance and abrasion resistance in extremely high flow rates (3 meters [9.8 feet] per second) with high abrasive content (15–17 percent). e ability for the installed liner to handle these key elements drove the specifica- tion of the system selected." Before choosing Nukote's line, the client completed tests on various coating systems to help them ensure performance. "Another factor was the ability of the system to be maintained after the film thickness degraded below the 70 percent factor," Osborne said. "is particular elastomeric coating is easy to maintain or rehabilitate without going back to substrate At the Nanhua Reservoir in Taiwan, the new concrete and steel desilting tunnel needed to be protected. Thirty crew members from Integral Technology covering 30,000 m2 (322,917.3 sq. ft.) is taking 2.5 years to complete.

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