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Restoration of the Pemaquid Point Lighthouse, Bristol, Maine
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Failure of flooring materials is usually due to a combination of factors rather than a single, simple cause that led to below expectation performance. For example, construction on a less than high quality concrete slab on grade, combined with the absence of a vapor retarder, with residual concrete wear and contamination, followed by inadequate surface preparation, and finally poor coating selection applied during inclement ambient conditions that is turned over early to severe service is a recipe for disaster.
The Energy Innovation Center’s approximately 80-year-old concrete floor had significant divots and was badly spalled and cracked. The concrete floor, often referred to as “The Racetrack” due to its oval shape, serves as the main hallway to a newly renovated technology hub and needed significant structural and aesthetic work. The re-finished floor had to offer durable functionality as well as blend into the neo-industrial look of the re-tasked building.
Structures are made of different substrates and materials. In order to protect these structures from the impact of corrosion, virtually everything is coated with some combination of paints, lacquers, epoxies, and thermoplastics. Inspecting structures requires multiple types of tests including measuring the thickness of a wide variety of protective coatings. This paper will discuss flexible measurement devices and how the utilization of various probes provides the best measurement results for specific applications.
The use of passive fire protection (PFP) materials plays an integral role in mitigating fire risk in commercial buildings. Traditional application of these materials has been on-site following the erection of structural steel. Their mechanical durability, exposure to weather and in-flexibility have been a major concern for construction managers and architects.
During April 2010 through June 2010, tank repairs were performed at Defense Fuel Support Point (DFSP) in San Pedro, CA. A two-part Modified Epoxy Novolac Polysulfide Coating was applied to three (3) previously uncoated 50,000 barrel (Bbl) underground concrete storage tanks. The tanks have been in operation since 1942, storing various bunker and jet fuels. The scope included surface evaluation, surface preparation, concrete sealer application and coating application.
This is a general outline of different types of high-performance coatings used for industrial steel structures and maintenance. We will be discussing the different types of coatings and where and when they are to be used, the make-up of these coatings, application methods, advantages/disadvantages, tolerance, and limitations. I was going to discuss the cost range of each but due to the different performance levels that each brand offers it is hard to put cost in perspective without digging into specific brands of coatings.
Fiberglass-reinforced plastic (FRP) linings are used worldwide to prevent the corrosion and deterioration of storage tank bottoms in petroleum, petrochemical, and other services. Experience has shown that the useful life of an FRP lining may exceed 25 years. API Standard 653 permits a minimum remaining thickness of the tank bottom plate to be 1.25 mm (0.050 in) when lined with FRP compared to a thickness of 2.5 mm (0.10 in) if unlined or lined with a nonreinforced coating system and not equipped with a tank bottom leak detection system.
While traditional cleaning solutions can be time consuming, costly and ineffective, dry ice blast cleaning provides a completely dry solution that cleans faster and more efficiently, while reducing downtime and supporting environmental initiatives. This presentation will discuss the basic concepts of dry ice cleaning. Participants will learn the benefits of the process, as well as, how it can benefit their production, improve quality, and support an environmentally responsible production environment.
Optimizing power generated from wind needs bigger improved designs and windy conditions, thus increasing installations offshore. As component costs decrease and processes improve, it can be profitable for farm developers to go further from shore into deeper waters and high-risk areas. In addition, the lifecycle expectancies of a coating system have developed along the way, moving from a typical >15 years expected lifetime in a given environment, to now >25 years.
Fiber-reinforced polymer (FRP) strengthening has become a common technique used by many State Departments of Transportation (DOTs) around the country to address deficiencies with bridge structures. Carbon fiber strengthening systems are routinely used to strengthen pier caps, pier columns, concrete girders, impact damaged girders, and now steel structures. The paper will introduce the audience to the materials and the unique characteristics that make them so prized for repair and strengthening applications in civil infrastructure applications. Their use in bridge projects will be highlighted.