Download or read book Adhesion of Epoxy Coating to Steel Reinforcement Under Alkaline Conditions written by Rana Jr Masoudi and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corrosion Protection of Reinforcing Steels written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2009-01-01 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has long been recognised that corrosion of steel is extremely costly and affects many industry sectors, including concrete construction. The cost of corrosion of steel reinforcement within concrete is estimated at many billions of dollars worldwide. The corrosion of steel reinforcement represents a deterioration of the steel which in turn detrimentally affects its performance and therefore that of the concrete element within which it has been cast. A great amount of work has been undertaken over the years concerning the prevention of corrosion of steel, including the application of coatings, which has included the study of the process of corrosion itself, the properties of reinforcing steels and their resistance to corrosion as well as the design of structures and the construction process. The objective of fib Bulletin 49 is to provide readers with an appreciation of the principles of corrosion of reinforcing steel embedded in concrete and to describe the behaviour of particular steels and their coatings as used to combat the effects of such corrosion. These include galvanised reinforcement, epoxy coated reinforcement, and stainless reinforcing steel. It also provides information on the relative costs of the materials and products which it covers. It does not deal with structure design or the process of construction or with the post-construction phase of structure management including repair. It is hoped that it will nevertheless increase the understanding of readers in the process of corrosion of reinforcing steels and the ability of key materials and processes to reduce its harmful effects.
Download or read book Experimental methods for evaluating epoxy coating adhesion to steel reinforcement written by Miguel Antonio Lorenzo and published by . This book was released on 1997 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance of Epoxy coated Reinforcing Steel in Highway Bridges written by Kenneth C. Clear and published by Transportation Research Board. This book was released on 1995 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Parameters Governing the Corrosion Protection Efficiency of Fusion bonded Epoxy Coatings on Reinforcing Steel written by and published by . This book was released on 2008 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to investigate various epoxy coating and exposure parameters to determine their effects on the corrosion of reinforcing steel. The parameters investigated were: chloride content at the bar depth, coated bar corroded area, corrosion product color under the coating, epoxy coating adhesion, coating color, coating damage (holidays and holes), coating thickness, TGA, DSC and EDS analysis and SEM coating cracking investigation. This study demonstrated that the ECR coating samples extracted from concrete exhibited extensive cracking compared to the new ECR samples in which the coating cracking was limited to only one sample. The coating cracking correlated with the amount of chloride at bar level, residual adhesion of the epoxy to the steel surface, and the percent moisture in the coating. The coating cracking is also related to the change in color of the epoxy and indicates that the epoxy coating degradation in concrete influences the surface condition of the coating. The DSC results showed that both the extracted epoxy coating samples as well as new samples are not fully cured during the manufacturing process. Additionally, the extracted epoxy coated samples investigated presented significant permanent adhesion loss with little or no epoxy coating residue present on the bar surface, while the EDS analysis showed that once adhesion is lost, corrosion will proceed unimpeded under the coating even in the absence of chlorides. The parameters that presented a direct correlation with the observed corrosion activity were the number of holidays and the number of damaged areas per unit length of bar. The results also show a distinct loss of quality control in the handling and possibly storage of new coated bars. The new ECR samples had significantly higher damage density than the samples extracted from concrete, while there was no change in the number of holidays and cure condition.
Download or read book Coating Protection for Reinforcement written by C. Andrade and published by Thomas Telford. This book was released on 1995 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides a technical survey of the most common coating protection systems for steel reinforcement, the use of which is rapidly increasing at present. The text also evaluates the practical effect of the systems and is the result of a research project conducted by a CEB task group which was specifically assembled to address the need for more information in this subject area.
Download or read book Corrosion Protection Performance of Corrosion Inhibitors and Epoxy coated Reinforcing Steel in a Simulated Concrete Pore Water Solution written by Wioleta A. Pyć and published by . This book was released on 1998 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: We used a simulated concrete pore water solution to evaluate the corrosion protection performance of concrete corrosion-inhibiting admixtures and epoxy-coated reinforcing bars (ECR). We evaluated three commercial corrosion inhibitors, ECR from three coaters removed from job sites, one ECR shipped directly from the coater's plant, and one ECR removed from a job site plus a corrosion inhibitor. The corrosion inhibitors were calcium nitrite, an aqueous mixture of esters and amines, and a mixture of alcohol and amine. Corrosion protection performance was based on the amount of visually observed corroded surface area. For bare steel tested with and without corrosion inhibitors, corrosion increased with increasing chloride concentration, and specimens saturated with oxygen were more corroded than specimens saturated with breathing air. The amount of corrosion over the 90-day test period was controlled by the amount of oxygen in solution at the higher chloride concentrations. The ester-amine and alcohol-amine did not inhibit corrosion. Calcium nitrite inhibited corrosion at all levels of chloride concentration. For ECR, corrosion occurred both at sites where the coating was damaged and underneath the coating. Coating debondment was greatest in pore water solutions containing chloride. The least coating debondment and corrosion occurred in the solution containing calcium nitrite and the ECR shipped directly from the manufacturer. Coating debondment and corrosion of ECR are directly related to the amount of damage as holes; mashed, dented, and cracked areas; and holidays. The researchers recommend that the developed test method be adopted as a standard test for concrete corrosion inhibitors and that calcium nitrite remain the only concrete corrosion inhibitor approved for use in Virginia.
Download or read book Special Report Coastal Engineering Research Center written by Coastal Engineering Research Center (U.S.) and published by . This book was released on 1983 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Report written by and published by . This book was released on 1981 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manual on Service Life of Corrosion damaged Reinforced Concrete Bridge Superstructure Elements written by Ali Akbar Sohanghpurwala and published by Transportation Research Board. This book was released on 2006 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long Term Performance of Epoxy Coated Reinforcing Steel in Heavy Salt Contaminated Concrete written by and published by . This book was released on 2004 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes results obtained from a long-term natural weathering exposure testing of the remaining 31 post-Southern Exposure (SE) test slabs that contained epoxy-coated reinforcing bar (ECR), black bars, and stainless steel bars and were not autopsied during the 1993-1998 Federal Highway Administration (FHWA) research project. The test slabs had been exposed to the very aggressive SE test, which involved alternating wetting with 15 weight percent NaCl solution and air drying cycles for 96 weeks. The test results confirmed that the black bars produced the highest mean macrocell current density (least corrosion resistant) among various combinations of test variables regardless of slab configuration and the stainless steel bars exhibited negligible mean macrocell current density. The performance of straight top-mat ECRs varied from 7 to 40 percent of the highest black bar case, as measured by macrocell current density, depending on the size of the initial coating damage and the type of bar in the bottom mat. ECR used in the top mat alone reduced the corrosion susceptibility to at least 50 percent of the black bar case, even when it contained coating damage and was connected to the black bar bottom mat. If straight ECRs in the top mat were connected to ECRs in the bottom mat, the mean macrocell current density was no greater than two percent of the highest black bar case and approached the corrosion resistant level of stainless steel reinforcement. Autopsy of ECR slabs exhibiting negligible macrocell current density revealed excellent condition with no sign of corrosion. However, ECRs exhibiting high macrocell current densities showed coating deterioration and exhibited numerous hairline cracks and/or blisters in conjunction with reduced adhesion, coating disbondment (permanent loss of adhesion) and underlying steel corrosion. The test results of present and the earlier FHWA studies indicate that adhesion appeared to be a poor indicator of long-term performance of the coated bars in chloride contaminated concrete and it is concluded that there is no direct relationship between loss of adhesion and the effectiveness of ECR to mitigate corrosion.
Download or read book Durability of Building Materials Components 7 vol 1 written by C Sjostrom and published by Routledge. This book was released on 2018-12-12 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 2004. This volume presents the proceedings of the seventh Conference on the Durability of Building Materials and Components, held in May 1996. Emphasis is given to service life data and in-service performance, and the text reflects current research activity in these areas.
Download or read book Corrosion of Steel in Concrete written by Luca Bertolini and published by John Wiley & Sons. This book was released on 2013-02-26 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel-reinforced concrete is used ubiquitously as a building material due to its unique combination of the high compressive strength of concrete and the high tensile strength of steel. Therefore, reinforced concrete is an ideal composite material that is used for a wide range of applications in structural engineering such as buildings, bridges, tunnels, harbor quays, foundations, tanks and pipes. To ensure durability of these structures, however, measures must be taken to prevent, diagnose and, if necessary, repair damage to the material especially due to corrosion of the steel reinforcement. The book examines the different aspects of corrosion of steel in concrete, starting from basic and essential mechanisms of the phenomenon, moving up to practical consequences for designers, contractors and owners both for new and existing reinforced and prestressed concrete structures. It covers general aspects of corrosion and protection of reinforcement, forms of attack in the presence of carbonation and chlorides, problems of hydrogen embrittlement as well as techniques of diagnosis, monitoring and repair. This second edition updates the contents with recent findings on the different topics considered and bibliographic references, with particular attention to recent European standards. This book is a self-contained treatment for civil and construction engineers, material scientists, advanced students and architects concerned with the design and maintenance of reinforced concrete structures. Readers will benefit from the knowledge, tools, and methods needed to understand corrosion in reinforced concrete and how to prevent it or keep it within acceptable limits.
Download or read book Structural Concrete Volume 3 written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2010 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of the Structural Concrete Textbook is an extensive revision that reflects advances in knowledge and technology over the past decade. It was prepared in the intermediate period from the CEP-FIP Model Code 1990 (MC90) tofib Model Code 2010 (MC2010), and as such incorporates a significant amount of information that has been already finalized for MC2010, while keeping some material from MC90 that was not yet modified considerably. The objective of the Textbook is to give detailed information on a wide range of concrete engineering from selection of appropriate structural system and also materials, through design and execution and finally behaviour in use. The revised fib Structural Concrete Textbook covers the following main topics: phases of design process, conceptual design, short and long term properties of conventional concrete (including creep, shrinkage, fatigue and temperature influences), special types of concretes (such as self compacting concrete, architectural concrete, fibre reinforced concrete, high and ultra high performance concrete), properties of reinforcing and prestressing materials, bond, tension stiffening, moment-curvature, confining effect, dowel action, aggregate interlock; structural analysis (with or without time dependent effects), definition of limit states, control of cracking and deformations, design for moment, shear or torsion, buckling, fatigue, anchorages, splices, detailing; design for durability (including service life design aspects, deterioration mechanisms, modelling of deterioration mechanisms, environmental influences, influences of design and execution on durability); fire design (including changes in material and structural properties, spalling, degree of deterioration), member design (linear members and slabs with reinforcement layout, deep beams); management, assessment, maintenance, repair (including, conservation strategies, risk management, types of interventions) as well as aspects of execution (quality assurance), formwork and curing. The updated Textbook provides the basics of material and structural behaviour and the fundamental knowledge needed for the design, assessment or retrofitting of concrete structures. It will be essential reading material for graduate students in the field of structural concrete, and also assist designers and consultants in understanding the background to the rules they apply in their practice. Furthermore, it should prove particularly valuable to users of the new editions of Eurocode 2 for concrete buildings, bridges and container structures, which are based only partly on MC90 and partly on more recent knowledge which was not included in the 1999 edition of the Textbook.
Download or read book Epoxy Coated Steel for the Reinforcement of Concrete written by British Standards Institute Staff and published by . This book was released on 2000-02-15 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion-resistant materials, Reinforcing steels, Reinforcing materials, Steels, Bars (materials), Coated materials, Epoxy resins, Plastic coatings, Reinforced concrete, Concretes, Wires, Meshes, Welded joints, Prefabricated parts, Particulate materials, Surface treatment, Thickness, Continuous, Quality, Performance, Certificates of conformity, Storage, Identification methods, Thickness measurement, Quality assurance, Testing conditions, Flexibility, Mechanical testing, Adhesion tests, Approval testing, Production management, Test equipment, Test specimens, Microscopic analysis, Visual inspection (testing), Dimensional measurement, Determination of content, Contaminants, Charts, Grades (quality), Quality assurance systems
Download or read book Concrete in the Marine Environment written by P.K. Mehta and published by CRC Press. This book was released on 1991-12-03 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete has clearly emerged as the most economical and durable material for the building of the vast majority of marine structures. Reinforced concrete too has overcome the technological problems making it a suitable material for the construction of advanced marine structures such as offshore drilling platforms, superspan bridges and undersea tunn
Download or read book Advanced Polymer Concretes and Compounds written by Oleg Figovsky and published by CRC Press. This book was released on 2013-12-11 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: One way of improving performance attributes of building structures is to use a new class of materials—polymer composites. They have unique properties that combine high strength with features of non-metallic materials. Polymer concretes (PC) appear to offer many possibilities for producing new materials with desired physical and mechanical characteristics, such as improved mechanical strength, low permeability, and greater chemical resistance. Advanced Polymer Concretes and Compounds presents the results of theoretical and experimental research on efficient building material composites based on advanced polymer binders. This book examines the composition and properties of two new polymer concretes that have potential to solve various construction issues: rubber concrete based on a polybutadiene binder and silicate polymer concrete with an organo-silicate matrix. It examines the physical, mechanical, and technological properties of these PCs as well as their behavior in harsh environments and durability and reliability issues. The authors describe a new environmentally friendly polymer for monolithic industrial floor coverings and coatings—nonisocyanate polyurethanes. They also discuss advanced crack-resistant coatings based on water dispersion of chlorosulfonated polyethylene, which can be used on concrete, metal, and plastic for various industrial uses such as aircraft, automobiles, paint, and in shipbuilding and civil engineering. The book covers a new type of epoxy composition with nano-heterogenic structure with potential for better mechanical properties and chemical resistance, acid-resistant building materials based on a nanostructured binder, and an advanced environmentally friendly and weather-resistant fire-protective coating for indoor and outdoor application to flammable substrates. With a focus on novel concretes and protective compounds for a variety of environments, this book reflects the newest developments in the rapidly growing field of building materials engineering.
