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The purpose of this presentation is to introduce you to low-pressure, ambient temperature spraying of polyurea and to discuss the advantages of low-pressure spray equipment. Some of the inherent advantages are equipment cost, ease of use, less over-spray, and equipment mobility. This presentation will be divided into several key areas. We will examine features and benefits, general equipment specifications, capabilities, operation of the system, typical periodic maintenance requirements and examples of available options.
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The Minnesota Department of Transportation (MnDOT) with KTA-Tator, Inc. (KTA) conducted a one-day seminar on Bridge Maintenance Painting Strategy & Project Design in May 2013. One outcome of that seminar was the realization that MnDOT needed a more uniform method to rate the condition of coatings statewide during the biennial bridge safety inspections and a process to select and prioritize maintenance painting strategies. MnDOT assembled a Technical Advisory Panel to address these needs and launched a multi-objective study from October 2013 through June 2014.
The theoretical framework shown here includes a spreadsheet tool designed to accommodate all unique inputs and accounts for the time-value of money. It offers several output options, including the equivalent uniform annual cost, to aid decision makers in selecting coating systems.
This presentation is designed to assist wastewater treatment plant maintenance superintendents effectively design and implement maintenance painting projects. Recommended practices are described for all project phases, from the initial corrosion survey, through cost estimating, specification preparation, bidding, project administration, field inspection, and OSHA, environmental compliance and plant operation considerations.
It looks as though 2009 will be tagged the “Year of the Stimulus” within the context of public infrastructure painting. As It appears now, the general state of the economy, coupled with the elevated profile of our deteriorating infrastructure, has produced a dose of legislative steroids to get things rolling again in bridge maintenance work.
Sports facilities are constructed in nearly every city of the country and the world. Just as these cities themselves are unique in many ways, the facilities that serve the city’s athletes must also be unique. Programs for the design of these facilities must consider natural and man-made environments. But just how do these affect design and maintenance considerations?
Residential contractors who focus on becoming a service business can bring in ongoing revenue from existing customers through regularly scheduled maintenance coats. Every contractor should have a long-range system for tracking maintenance due dates, notifying customers and even set-up maintenance contracts to gain pre-approval of future work.
This paper discusses the history of coatings maintenance on the Golden Gate Bridge and the modern maintenance process including bi-annual inspection, prioritizing, scheduling and execution. Several current projects including water jetting and suspender painting are also discussed.
Corrosion is a durability concern for any unprotected structural steel from its exposure environment and coatings are widely used for corrosion protection. Zinc-rich primer-based three-coat (ZRP) systems are the most widely used for structural steel, since 1980’s. However, these coating systems often require regular maintenance. So, there is always interest to develop durable novel coating systems to reduce the maintenance cost.
The study objective was to evaluate the cost effectiveness and feasibility of a paint system warranty from a coatings manufacturer for a specified coating to be applied over steel with minimum surface preparation (without removing completely the existing coating or tightly adhering rust) and to evaluate the coating performance at the conclusion of the warranty period.
Many industries are operating under severely limited O&M budgets and have been for some time. “Lean and mean” in today’s reality has become “mal-nourished and over stressed”. The last major corrosion study conducted in our industry showed a $276 Billion/Yr. deficit of which 75% was unrecoverable. Now a new study has determined that it is never too late to restore measurable viability to a facility's operation through adequate and proper preventive maintenance. This is good news, providing we can adequately demonstrate and use it.
Common methods of maintenance painting have either involved complete removal of existing paint (e.g., SSPC-SP 10, Near White Blast Cleaning) or highly localized preparation of corroding areas using power or hand tools (e.g., SSPC-SP 2 or SSPC-SP 3). Sometimes projects may be designed to an intermediate level where the intent is to reduce the surface preparation level of effort by allowing “good” coatings to remain. In these cases, abrasive blasting or ultra-high pressure water jetting may be used to prepare the entire surface, but well adhered aged coating is allowed to remain.