Evaluation of Corrosion Detection Methods in Reinforced Concrete Structures PDF Download
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Author: Aynsley Griffin
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The objective of this thesis is to conduct a comprehensive comparative analysis of corrosion rate as determined by non-destructive field-applicable techniques and corrosion rate as determined by destructive gravimetric testing as per ASTM G-1. This is accomplished by a two-part experimental program: (1) a laboratory study that monitors the corrosion of reinforcement in reinforced concrete slabs subjected to an accelerated deterioration in a controlled environment, and (2) a field study based on the condition assessment of the deck of the North Channel Bridge, an existing reinforced concrete structure located in Cornwall, ON. Non-destructive techniques analyzed include half-cell potential, linear polarization resistance, galvanostatic pulse technique, connectionless electronic pulse response analysis and four-point electrical resistivity. Generally, corrosion rate as determined by NDT measurements is in agreement, to the same order of magnitude, with the average corrosion rate determined by destructive means. Measurements using the galvanostatic pulse technique are in better agreement with gravimetric measurements than those obtained from the connectionless electronic pulse response analysis and linear polarization technique. Electrical resistivity measurements proved to be a reliable indicator of the concrete condition; these are in agreement with values reported in the literature. From the results of this research, it is concluded that the industry practice of using half-cell potential measurements in the field should be complemented with other NDT techniques, such as electrical resistivity or connectionless electronic pulse response analysis, to obtain a more accurate assessment of the corrosion activity in a reinforced concrete structure undergoing reinforcement corrosion.
Author: Aynsley Griffin
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The objective of this thesis is to conduct a comprehensive comparative analysis of corrosion rate as determined by non-destructive field-applicable techniques and corrosion rate as determined by destructive gravimetric testing as per ASTM G-1. This is accomplished by a two-part experimental program: (1) a laboratory study that monitors the corrosion of reinforcement in reinforced concrete slabs subjected to an accelerated deterioration in a controlled environment, and (2) a field study based on the condition assessment of the deck of the North Channel Bridge, an existing reinforced concrete structure located in Cornwall, ON. Non-destructive techniques analyzed include half-cell potential, linear polarization resistance, galvanostatic pulse technique, connectionless electronic pulse response analysis and four-point electrical resistivity. Generally, corrosion rate as determined by NDT measurements is in agreement, to the same order of magnitude, with the average corrosion rate determined by destructive means. Measurements using the galvanostatic pulse technique are in better agreement with gravimetric measurements than those obtained from the connectionless electronic pulse response analysis and linear polarization technique. Electrical resistivity measurements proved to be a reliable indicator of the concrete condition; these are in agreement with values reported in the literature. From the results of this research, it is concluded that the industry practice of using half-cell potential measurements in the field should be complemented with other NDT techniques, such as electrical resistivity or connectionless electronic pulse response analysis, to obtain a more accurate assessment of the corrosion activity in a reinforced concrete structure undergoing reinforcement corrosion.
Author: Luca Bertolini
Publisher: John Wiley & Sons
ISBN: 3527651713
Category : Technology & Engineering
Languages : en
Pages : 389
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Book Description
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.
Author: Christiane Maierhofer
Publisher: Elsevier
ISBN: 1845699602
Category : Technology & Engineering
Languages : en
Pages : 631
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Book Description
Engineers have a range of sophisticated techniques at their disposal to evaluate the condition of reinforced concrete structures and non-destructive evaluation plays a key part in assessing and prioritising where money should be spent on repair or replacement of structurally deficient reinforced concrete structures. Non-destructive evaluation of reinforced concrete structures, Volume 2: Non-destructive testing methods reviews the latest non-destructive testing techniques for reinforced concrete structures and how they are used. Part one discusses planning and implementing non-destructive testing of reinforced concrete structures with chapters on non-destructive testing methods for building diagnosis, development of automated NDE systems, structural health monitoring systems and data fusion. Part two reviews individual non-destructive testing techniques including wireless monitoring, electromagnetic and acoustic-elastic waves, laser-induced breakdown spectroscopy, acoustic emission evaluation, magnetic flux leakage, electrical resistivity, capacimetry, measuring the corrosion rate (polarization resistance) and the corrosion potential of reinforced concrete structures, ground penetrating radar, radar tomography, active thermography, nuclear magnetic resonance imaging, stress wave propagation, impact-echo, surface and guided wave techniques and ultrasonics. Part three covers case studies including inspection of concrete retaining walls using ground penetrating radar, acoustic emission and impact echo techniques and using ground penetrating radar to assess an eight-span post-tensioned viaduct. With its distinguished editor and international team of contributors, Non-destructive evaluation of reinforced concrete structures, Volume 2: Non-destructive testing methods is a standard reference for civil and structural engineers as well as those concerned with making decisions regarding the safety of reinforced concrete structures. Reviews the latest non-destructive testing (NDT) techniques and how they are used in practice Explores the process of planning a non-destructive program features strategies for the application of NDT testing A specific section outlines significant advances in individual NDT techniques and features wireless monitoring and electromagnetic and acoustic-elastic wave technology
Author: fib Fédération internationale du béton
Publisher: fib Fédération internationale du béton
ISBN: 2883940991
Category : Technology & Engineering
Languages : en
Pages : 73
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Book Description
For the ongoing condition assessment of concrete structures, it is necessary to identify the extent, nature, cause and prognosis of any deterioration using a range of tools and methods, including prediction models. Combined with the original design and construction details, this gives a vast amount of information over a long time period. A framework concept is therefore needed to process the entirety of the information in order to make sound investment decisions on future maintenance management. To provide such a framework, fib Bulletin 59 summarizes information published infib Bulletins 17, 22, 34 and 44 relevant to the control and assessment of reinforced concrete structures, and develops a practical concept of how, when and where to control the condition of an existing concrete structure in order to facilitate structural management. Thus it gives a basis for processing relevant information in order to make decisions on the appropriate course of action for condition control.
Author: fib Fédération internationale du béton
Publisher: fib Fédération internationale du béton
ISBN: 9782883940628
Category : Technology & Engineering
Languages : en
Pages : 316
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Book Description
The condition assessment of aged structures is becoming a more and more important issue for civil infrastructure management systems. The continued use of existing systems is, due to environmental, economical and socio-political assets, of great significance and is growing larger every year. Thus the extent of necessary repair of damaged reinforced concrete structures is of major concern in most countries today. Monitoring techniques may have a decisive input to limit expenditures for maintenance and repair of existing structures. Modern test and measurement methods as well as computational mechanics open the door for a wide variety of monitoring applications. The need for quantitative and qualitative knowledge has led to the development and improvement of surveillance techniques, which have already found successful application in other disciplines such as medicine, physics and chemistry. The design of experimental test and measurement systems is inherently an interdisciplinary activity. The specification of the instrumentation to measure the structural response will involve the skills of civil, electrical and computer engineers. The main aim of fib Commission 5, Structural servicer life aspects, is to provide a rational procedure to obtain an optimal technical-economic performance of concrete structures in service and to ensure a feedback of experience gained to design, execution, maintenance and rehabilitation. Against this background fib Task Group 5.1 Monitoring and Safety Evaluation of Existing Concrete Structures had been established to evaluate the existing practice worldwide. The objective of this state-of-art report is to summarize the most important inspection and measuring methods, to describe the working process and to evaluate the applicability to structural monitoring. Particular emphasis is placed upon non-destructive systems, lifetime monitoring, data evaluation and safety aspects.
Author: El Kacimi, Younes
Publisher: IGI Global
ISBN: 1799827771
Category : Technology & Engineering
Languages : en
Pages : 304
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Book Description
Metals are used at an extremely high rate in the industrial and manufacturing fields. Exemplary properties including strength and ductility have made this material highly dynamic; however, the risk of corrosion remains a vital issue. The study of corrosion prevention has attracted interest from researchers and professionals as new technologies are emerging that can assist in the prevention of material destruction. However, research is lacking on the application of these protective technologies within specific fields. New Challenges and Industrial Applications for Corrosion Prevention and Control provides emerging research exploring the theoretical and practical aspects of protective methods against corrosion and the implementation of these techniques within a wide span of professional disciplines. Featuring coverage on a broad range of topics such as molecular modeling, surface treatments, and biomaterials, this book is ideally designed for engineers, industrial chemists, material scientists, researchers, engineers, academicians, practitioners, and students seeking current research on the technological advancements in corrosion protection in various professional scopes.
Author: Amir Poursaee
Publisher: Woodhead Publishing
ISBN: 0323851320
Category : Technology & Engineering
Languages : en
Pages : 400
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Book Description
Essential reading for researchers, practitioners, and engineers, this book covers not only all the important aspects in the field of corrosion of steel reinforced concrete but also discusses new topics and future trends. Theoretical concepts of corrosion of steel in concrete structures, the variety of reinforcing materials and concrete, including stainless steel and galvanized steel, measurements and evaluations, such as electrochemical techniques and acoustic emission, protection and maintenance methods, and modelling, latest developments, and future trends in the field are discussed. Comprehensive coverage of the corrosion of steel bars in concrete, investigating the range of reinforcing materials, and types of concrete Introduces the latest measuring methods, data collection, and advanced modeling techniques Second edition covers a range of new, emerging topics such as the concept of chloride threshold value, concrete permeability and chloride diffusion, the role of steel microstructure, and innovations in corrosion detection devices
Author: Mohamed Abdallah El-Reedy
Publisher: CRC Press
ISBN: 1351657917
Category : Technology & Engineering
Languages : en
Pages : 208
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Book Description
This book examines the corrosion of reinforced concrete from a practical point of view, highlights protective design and repair procedures, and presents ongoing maintenance protocols. Updated throughout, this new edition adds additional information on concrete repair using Carbon Fiber Reinforced Polymers (CFRP), and reviews new examples of the effects of corrosion on both prestressed and reinforced concrete structures. It also examines economic analysis procedures and the probability of structural failures to define structural risk assessment, and covers precautions and recommendations for protecting reinforced concrete structures from corrosion based on the latest codes and specifications.
Author: H Böhni
Publisher: Elsevier
ISBN: 1845690435
Category : Technology & Engineering
Languages : en
Pages : 263
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Book Description
Reinforced concrete has the potential to be very durable and capable of withstanding a variety of adverse environmental conditions. However, failures in the structures do still occur as a result of premature reinforcement corrosion. In this authoritative book the fundamental aspects of this complex process are analysed; focusing on corrosion of the reinforcing steel, and looking particularly, at new scientific and technological developments. Monitoring techniques, including the newly developed online-monitoring, are examined, as well as the numerical methods used to simulate corrosion and perform parameter studies. The influence of composition and microstructure of concrete on corrosion behaviour is explored. The second half of the book, which deals with corrosion prevention methods, starts with a discussion on stainless steels as reinforcement materials. There are comprehensive reviews of the use of surface treatments and coatings, of the application of corrosion inhibitors and of the application of electrochemical techniques. In each case the necessary scientific fundamentals are explained and practical instances of use are looked at. This is an invaluable guide for engineers, materials scientists and researchers in the field of structural concrete. Fundamental aspects of corrosion in concrete are analysed in detail Explores how to minimise the effects of corrosion in concrete Invaluable guide for engineers, materials scientists and researchers in the field of structural concrete
Author: J.P. Broomfield
Publisher: CRC Press
ISBN: 0203475283
Category : Architecture
Languages : en
Pages : 263
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Book Description
The corrosion of reinforcing steel in concrete is a major problem facing civil engineers and surveyors throughout the world today. There will always be a need to build stuctures in corrosive environments and it is therefore essential to address the problems that result. Corrosion of Steel in Concrete provides information on corrosion of steel in at
