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When a project finally reaches the bidding stage, many of the owner’s questions and concerns regarding the project's outcome have been considered. However, given the ongoing effort to continually extend every assets useful service life, one important question that gets asked more and more is “How long is my coating system going to last?”
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There are several thousand bridges that are scheduled for maintenance painting both in the State of Tennessee and Missouri. The Caruthersville Bridge (I-155 Mississippi River Bridge) is an on-going project, which is the northern-most bridge over the Lower Mississippi River, with the combined flow of the Upper Mississippi and the Ohio River.
Choosing the right colors for any paint job is very important and can be fun. Remember when you were a child and got a coloring book for your birthday? Imagine if your canvas for coloring wasn’t bound pages, but rather the amazing Brooklyn Bridge. Wouldn’t that be exciting?
Since the inception of the US commercial nuclear power program in the 1950’s, criteria have existed for ensuring the satisfactory performance of reactor containment protective coatings over the life of the plant. These criteria have been modified and updated periodically to reflect improvement of the industry and regulatory experience and knowledge bases. This presentation reviews the development of the current qualification requirements for US commercial nuclear power plant reactor containment coatings.
The program focuses on aiding an engineer, contractor, or decision maker in selecting the most appropriate type of traffic bearing coating system for a given application for parking structures. The program reviews the various type of traffic bearing coating systems that are offered in today’s market, the pros and cons of each and how the parking structure construction type (precast, cast in place, etc.) may affect performance of these systems.
The wastewater industry embraces “going green” but it is not just about the latest and greatest VOC compliant products on the market. Green starts with advanced coatings technology and the knowledge and support of the industry professionals from design to completion and beyond.
A unique project was completed in Mid-2014 at the Powerhouse #3, Turbine Unit #23 refurbishment, Grand Coulee Dam, located in Washington State. The project scope includes a complete overhaul of the turbine bearings, windings, and critical components. As part of the overall scope, the contractor was charged with the task of coating the entire draft tube surface with an epoxy gel. The Bureau of Reclamation, based in Denver, Colorado, had conducted a site survey which indicated severe wear lines, which result in cavitation and the accompanying backpressure on the exiting water outflow to the Columbia River.
This paper will provide information on the standards used in evaluating and determining correct application and selection of protective coatings and linings used in the wastewater industry. It will also highlight certification that can be used in evaluating contractors and inspection companies used in the coating and lining process.
Although bridge construction extends back thousands of years, steel bridge painting is in its infancy. The first iron bridge was built in 1779, and the first steel was used in a bridge in 1828. Coated bridges from the 19th century survive, raising the question, “Can coatings protect steel bridges for the next hundred years?” The author discusses how to achieve 100 years of service life using current materials and offers recommendations for improving steel bridge painting.