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This paper will discuss the many factors affecting the timing for concrete shrinkage (and related cracking) as well as the rate of loss of excess moisture which are not reliant on 28 days of concrete cure time. In addition, case histories will be presented evidencing successful coating applications on concrete well before 28 days of cure time versus coating problems experienced well beyond 28 days of concrete cure.
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Over the past decade, coating manufacturers have made significant strides in the formulation of new products, utilizing new polymers and enhanced pigments that produce improvements in weatherability, corrosion protection, and ease of application, while improving compatibility with existing coatings, and offering enhanced physical, and thermal resistance. However, coating product data sheets typically portray anticipated coating performance under favorable laboratory conditions that may not reflect actual field conditions during surface cleaning and application operations.
Composite coatings are a class of materials that are described as fiber-reinforced polymers (FRP) that consist of extremely strong tensile fibers saturated in a binding resin. From the original development as tank bottom lining materials designed to handle surface movement and corrosion, the applications for composite coatings have broadened and moved into the mainstream, with industry-accepted design codes written around their uses and applications
Construction labor experts are becoming overwhelmingly concerned that we will not have the workforce to maintain, let alone rebuild, our country’s infrastructure. Projections for Project Management and Skilled Labor tell us the issue is worsening by the day with no solution on the horizon. Confidence in employee and employer accountability is at an all time low. The painting and coating industry is both safety sensitive and labor intensive. This risk is unique, in that it touches every aspect of your company, starting with employee safety.
Liquid-applied protective linings are commonly used to protect concrete structures found within water and wastewater treatment facilities. There are a number of referenced industry standards and guidelines detailing the construction of new concrete, evaluation of existing concrete, and surface preparation of concrete. This paper provides recommendations based on industry standards and related publications, as well as drawn from practical experience for preparing concrete for immersion conditions or chemical containment service in water and wastewater treatment.
Corrosion 2018 Conference Proceedings Papers 10446 to 10847
Corrosion 2018 Conference Proceedings 10848 to 11008
Corrosion 2018 Conference Proceedings 11009 to 11182
Corrosion 2018 Conference Proceedings 11183 to 11390
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The installation of linings to large diameter cooling pipes and penstocks is a major investment in hydroelectric and other power plants. The application should be performed in an expedient manner to minimize outage time and should last for many years (20 years or more) without the need for maintenance painting.
Coatings are widely used for highway steel bridges exposed to aggressive environments to extend their service life. Even with the continuous development of coating technologies, steel bridges remain susceptible to corrosion deterioration. Periodic maintenance, that may include coating repair, is required for long term bridge serviceability. Selection of compatible repair coating materials and appropriate preparation of the steel surface are critical parameters for corrosion protection.