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Legacy SSPC Conference Papers
This presentation briefly updates a two-part article printed in Water Engineering & Management in 2001. It begins with the benefits of waterborne coatings and gives examples of where they may be used.
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A formulated nanoparticle dispersion increases the cross linking of waterborne protective coatings without reducing the formula shelf life. Among the cross linking-related improvements are MEK rub resistance, humidity and immersion resistance, tensile strength and blocking resistance. The findings are in accord with a non-covalent mechanism of cross linking.
Coatings are utilized in a wide variety of applications (floor, wall, roof, etc.) and on many different substrates (concrete, steel, drywall, etc) in commercial architectural settings, and performance requirements will obviously vary depending on the intended use and environment.
Coatings are constantly being asked to go to greater extremes, such as lower VOC and higher performance. This paper will discuss coating technologies that are being asked to go beyond the typical protective and aesthetic aspects of coatings and offer other functions. Several types of waterborne functional coatings will be described, including technologies for combating noise, heat, and air pollutants.
Concrete and other cementitious surfaces are porous materials that will allow water and soluble contaminants to penetrate the structure leading to degradation. The effects of degradation can include efflorescence, laitance and physical defects such as cracking and spalling. Waterproofing concrete can protect it from freeze/thaw cycles, increase chemical resistance, and provide protection to imbedded reinforcing steel.
The Federal Highway Administration has a top-level technology goal targeted toward the development and deployment of the “Bridge of the Future.” This is a conceptual short span bridge that demonstrates significant improvements over the current state of the practice – particularly with regard to ease and speed of construction and long-term durability.
Restoration of steel and concrete surfaces has relied heavily on sandblasting and other dry blasting techniques. For over a century, dry blasting has been an effective, but dusty approach in removing coatings, contaminants, corrosion, and residues, with emissions of silica and other abrasive or substrate particles linked to negative health and environmental impacts.
With more stringent silica regulations being enforced, wet abrasive blasting is becoming more prevalent in the industry. We investigated the viability of wet abrasive blasting as compared to the more commonly used dry abrasive blast. One added benefit of wet abrasive blasting is the removal of soluble salts in addition to providing the specified profile.
This paper will cover what are"nuclear"coatings as well as special nuclear requirements.
The polarity of the zinc-steel galvanic couple in hot aqueous solutions was published more than 20 years ago. It used an inorganic zinc primer coating that was applied under thermal insulation at elevated temperatures [30C-60C (86F-140F)]. Since the year 2000, industrial practices or standards do not recommend using inorganic zinc rich coatings under thermal insulation. Research has showed over the years that good practice of corrosion prevention under insulation is to apply an additional layer of a heat resistant modified epoxy or inorganic polymer coating as an additional barrier.
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.
Like most manufacturing representatives, representatives of the paints and coatings manufacturing industry know less about architects/specifiers than what architects/specifiers know about the paints and coatings manufacturing industry. The purpose of this presentation is to provide the paints and coatings manufacturing industry with (a) insight into the mysterious world of architects/specifiers; and (b) to explain what architects/specifiers expect of manufacturing representatives.