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RARELY SEEN RESEARCH: BRIDGES: A LOOK BACK--Case Studies in Concrete: Substructures consists of 20 years of technical papers and case studies written by engineers and researchers that address challenges that engineers face in the field, and the materials research being done to mitigate those challenges.
2023 AMPP e-book, 398 pages, color
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RARELY SEEN RESEARCH: Bridges: A Look Back—Historic Studies in Cathodic Protection: The 1990s, is a companion book to Bridges: A Look Back—Case Studies in Cathodic Protection: Substructures and Bridges: A Look Back—Case Studies in Cathodic Protection: Superstructures, both of which consist of nearly 30 years of curated legacy NACE technical papers and journal articles that cover exactly what the titles suggest.
This book consists of edited case histories, while the two original titles are compiled of the original, unabridged technical papers and journal articles.
2023 AMPP, 6 x 9 trim size, 52 pages, color
RARELY SEEN RESEARCH: Bridges: A Look Back—Case Studies in Cathodic Protection: Superstructures consists of over 30 years of curated legacy NACE technical papers and journal articles that cover exacly what the title suggests.
It has a companion book that focuses on cathodic protection for bridge substructures.
2023 AMPP ebook
The State of Florida spends millions of dollars to mitigate corrosion and paint existing bridge structures each year. Since tourism is a big contributor to the State’s economy, it is of high importance to maintain these structures in a condition that is pleasing to the eye in order to provide a pleasant welcome for visitors to the Sunshine State.
The present paper reports results of analyses that address the influence of physical and modeling variables upon failure projections.
Corrosion of steel in reinforced concrete bridges is a major concern for the structural integrity, long-term durability, and maintenance of the highway infrastructure. Statistics from a national study in 2002 indicated that approximately 15% of the national bridge inventory is structurally deficient because of corrosion and the national annual direct cost exceeded $8 billion.1 In the state of Florida, the typical design life expectation for the >6,000 bridges in the state highway infrastructure exceed 75 years.
The most commonly accepted way to protect structural steel on bridges is with liquid applied coatings (paint). The current life expectancy for field-applied protective coatings (maintenance painting) is about 20 years in snow/ice and marine areas. Most bridge owners use a remove-and replace strategy for maintenance painting, with unit costs usually in excess of $10.00 per ft. The cost of maintaining a protective coating during the service life of a bridge may approach the bridge’s original construction costs.
These case studies are presented demonstrating the cost savings and performance of one-coat direct-to-metal (DTM) and two-coat polyaspartic exterior coatings of three industrial maintenance applications involving hopper railcars, bridges, and an exposed steel beam superstructure. In each example, the rapid cure time of the polyaspartic coating provided increased productivity to complement its documented high performance.
Managing aging reinforced concrete infrastructure is a complex and capital-intensive task, particularly in harsh marine and coastal environments. Corrosion from saltwater, coupled with wet and dry cycles, are particularly problematic for long-term durability of reinforced concrete. The Gulf Coast presents a challenge for maintaining service life of concrete structures that are exposed to high levels of chlorides, either by direct contact with salty or brackish water or by indirect contact with salt spray. Chlorides induce corrosion of the steel reinforcement which initiates cracking and spalling of the concrete, reducing the service life of the structure.
Overcoating and other maintenance painting practices of the Texas Department of Transportation are discussed.
Reviews a recently proposed predictive model that projects the onset and subsequent rate of wire and strand fractures and tendon failures as a function of time. Includes first fracture onset results for wires and strands, failure onset for tendons, failure rates and testing of simulated tendons.
Fluorourethane coatings based on FEVE, fluoroethylene vinyl ether chemistry, have been used globally for over 30 years. This technology has a proven record of outstanding performance against exposure to the elements and has been used in applications ranging from aerospace to architectural structures. Recently, the bridge market has taken notice of this high performance, especially in harsh marine environments. Resistance to degradation by UV light is important to the longevity of a bridge structure, but it could be argued that corrosion resistance is the key performance indicator for a protective topcoat.