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A security barrier's compromised corrosion protection / Jay Helsel in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 10 (10/2018)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 10 (10/2018) . - p. 11-13 Titre : A security barrier's compromised corrosion protection Type de document : texte imprimé Auteurs : Jay Helsel, Auteur Année de publication : 2018 Article en page(s) : p. 11-13 Langues : Américain (ame) Catégories : Délaminage Expertises Métaux -- Revêtements protecteurs Polyéthylène basse densité Revêtements -- Analyse Revêtements -- Défauts Index. décimale : 667.9 Revêtements et enduits Résumé : A new perimeter security barrier was installed at an electrical power station in the rural, mid-Atlantic U.S. Installed over several weeks in the late fall, the barrier was construted from thin galvanized sheet panels, approximately 6 feet by 8 feet in size, that were formed into a corrugated shape and then shop-coated. The formed shape had horizontally angled bends across the sheet (near the top and bottom) and multiple vent openings. The primary surface preparation in the shop consisted of a degreasing process using an acidic solution. The galvanized sheet was then powder coated in a fluidized bed process with a low-density polyethylene (LDPE) coating material. Field touch-up was accomplished using an acrylic primer/finish coating. The following spring, coating failure was first reported in the form of delamination from the galvanized substrate. The failure grew worse as the year progressed, and the facility owner contracted with an independent coating consulting firm to investigate the premature failure. Note de contenu : - Site visit - Laboratory analysis - Fig. 1 : The glossy black coating had delaminated from the underlying galvanized metal sheeting Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31899 [article]

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Painting the Walt Whitman bridge / Kevin H. Keith in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 10 (10/2018)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 10 (10/2018) . - p. 14-20 Titre : Painting the Walt Whitman bridge Type de document : texte imprimé Auteurs : Kevin H. Keith, Auteur ; David M. Hatherill, Auteur Année de publication : 2018 Article en page(s) : p. 14-20 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Ponts -- entretien et réparations Ponts métalliques -- Revêtements protecteurs Qualité -- Contrôle Revêtements protecteurs -- Détérioration Index. décimale : 667.9 Revêtements et enduits Résumé : With a total lenght of 11,981 feet and average daily traffic (ADT) of 120,000 vehicles, the Walt Whitman Bridge has a 2,000-foot-long main span, making it the 10th largest suspension span in the United States and 27th in the world. In 2015, after completing the deck replacement of the suspension spans, the Delaware River Port Authority (DRPA) let their largest painting contract ever - over $57,000,000 to blast and paint the entire suspension span including the complete interior and exterior of the towers, deck support steel in the anchorages, suspension cables and various steel repairs. A construction monitoring contract was also awarded on a qualification-based selection. This article is a case study describing the skills that were required for the construction and engineering team, as well as unadvertised skills such as dealing with the nesting Peregrine falcons and the complexities of traffic control on a high-ADT bridge under containment. Note de contenu : - PROJECT CHALLENGES : Access - Nesting Peregrine falcons - Overspray - Chloride contamination - Time constraints - THE CONSTRUCTION MONITORING TEAM - QUALITY CONTROL - Fig. 1 : The Pennsylvania tower before blasting and painting - Fig. 2 : Typical paint condition before and after blasting and painting - Fig. 3 : Containment for the Pennsylvania tower and a portion of the main span - Fig. 4 : A bird's-eye view looking down on the main span towards Philadelphia from the New Jersey tower - Fig. 5 : The complete bridge Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31900 [article]

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Waterjetting & surface-tolerant coatings / Joao Azevedo in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 10 (10/2018)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 10 (10/2018) . - p. 24-28 Titre : Waterjetting & surface-tolerant coatings : UHP on the Luis I Bridge in Porto, Portugal Type de document : texte imprimé Auteurs : Joao Azevedo, Auteur Année de publication : 2018 Article en page(s) : p. 24-28 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Eaux usées -- Recyclage Epoxydes Ponts -- entretien et réparations Ponts métalliques -- Revêtements protecteurs Revêtements -- Décapage:Peinture -- Décapage Revêtements en phase aqueuse:Peinture en phase aqueuse Surfaces -- Nettoyage Index. décimale : 667.9 Revêtements et enduits Résumé : Overall, more than 97 percent of the steel surfaces were completely free of corrosion, with only up to 3 percent of some specific areas showing traces of corrosion not greater than Ri3 (less than 1 percent), according to ISO 4629-3, "Binders for paints and varnishes - Determination of hydroxyl value - Part 3 : Rapid test." This is testament to the superior protection that can be achieved by using UHP waterjetting together with a high-performance, damp surface-tolerant epoxy system for maintenance in an environmentally sensitive area. Note de contenu : - Fig. 1 : The Luis I Bridge, completed in 1886, was to replace an existing adjacent suspension bridge and consists of complex ironworks with one main arch which spanning 172 m, was the longest in the world at the time - Fig. 2 : A complex water-recycling system was developed that would enable the used water to be re-used for waterjetting or returned to the river as clean water. The system was based on a combination of mechanical separation through decantation and filtration, and a special activated carbon filter that absorbed any remaining contaminants - Fig. 3 : The containment system - Fig. 4 : The water recycling system - Fig. 5 : The coating condition after 15 years Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31914 [article]

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Adaptive reuse / Tom Murphy in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 35, N° 10 (10/2018)

[article]  inJOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 35, N° 10 (10/2018) . - p. 34-40 Titre : Adaptive reuse : repurposing the factory floor Type de document : texte imprimé Auteurs : Tom Murphy, Auteur Année de publication : 2018 Article en page(s) : p. 34-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Matériaux cimentaires -- Analyse Matériaux cimentaires -- Revêtements protecteurs Revêtements de sols industriels Sols -- Revêtements protecteurs Traîtements de surface Index. décimale : 667.9 Revêtements et enduits Résumé : Coating an existing concrete floor that has experienced previous use and abuse requires an extra measure of analysis and investigation to prevent potential problems and interruption of the new operations. With a complete understanding of the condition of the existing slab, the surface can be repaired and prepared, and issues can be mitigated to comply with the requirements of the new flooring system. The flooring system manufacturer should be consulted when selecting repair materials and evaluating the surface to be coated. Note de contenu : - Flooring performance requirements - Concrete condition assessment - Joints - Petrographic examination - Concrete surface contamination - Surface condition - Surface preparation - Fig. 1 : The Ford plant before renovation. This existing industrial plant had no concrete coating and was repurposed for heavy manufacturing, requiring a high-performance epoxy flooring system - Fig. 2 : The Ford plant after completion of the renovation - Fig. 3, 4 and 5 : Before and after photos of an old paper mill that was converted to a microbrewery - Fig. 6 : Alkali-silica-reaction-induced cracking of course aggregate - Fig. 7 : Photomicrograph of an oil-stained concrete substrate - Fig. 8 : An infrared spectrometry example of aliphatic hydrocarbons (motor oil) - Fig. 9 : An infrared spectrometry example representation of oil-contaminated concrete - Table 1 : Minimum acceptance criteria for concrete surface before coatings are applied - Table 2 : Classes of surface preparation Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31916 [article]

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Journal of protective coatings and linings Vol. 35, N° 10 URL