Author:
Publisher:
ISBN:
Category : Nondestructive testing
Languages : en
Pages : 26
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Book Description
Three nondestructive evaluation (NDE) methods for concrete pavements--surface ultrasonic pulse velocity measurements (UPV), the impact-echo (IE) method, and the use of a seismic pavement analyzer (SPA)--were tested on six sections of two continuously reinforced concrete pavements. The results were compared with the actual condition of the concrete as determined by visual inspection, photographic imaging, and examination of cores extracted from the sections. The IE and surface UPV methods were the best in indicating the existence of macroscopic cracks. However, each must be used over a relatively long period of time to determine the deterioration rate of pavement. In addition, to be practical and efficient for application in pavement inspection, mechanization of the instrumentation of each method would be required. Even though the SPA did not compare favorably with the IE and surface UPV methods in detecting cracks and delaminations, it provided information that could be used to derive the overall qualitative condition of each test section. The results with the SPA had a high correlation with a petrographically determined rating for alkali-silica reactivity. This correlation, if verified, can serve as the basis for using the inspection system to collect information that may be used to predict the future condition of a pavement. In comparison with the other methods, the SPA would require the least additional development to be an effective inspection method. Photographic imaging was extremely valuable. Although it did not probe into the concrete as did the three NDE methods/systems investigated, it captured the surface cracks and other surface features that may well be useful indicators of the future condition of the pavements. In view of the recent advancements in the technology of high-resolution digital imaging systems and computers that can make this inspection method quantitative, which it seriously needs to be, photographic imaging deserves attention as an NDE method.
Author:
Publisher:
ISBN:
Category : Nondestructive testing
Languages : en
Pages : 4
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Book Description
Author: Christiane Maierhofer
Publisher: Woodhead Publishing
ISBN: 9780081014639
Category : Technology & Engineering
Languages : en
Pages : 266
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Book Description
This authoritative book provides a comprehensive review of the highly important subject of non-destructive evaluation of reinforced concrete structures. Engineers have a range of sophisticated techniques at their disposal to assess the condition of reinforced concrete structures that do not cause material damage and which usually enable the structure to be used while the surveys are carried out. Non-destructive evaluation of the infrastructure also plays a key role in calculating and prioritising where money should be spent on repair or replacement. Providing details of related techniques and case studies, this book offers an overview of how to plan and implement the NDT of reinforced concrete structures.
Author:
Publisher:
ISBN:
Category : State government publications
Languages : en
Pages : 216
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Book Description
Author: George M. Pace
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 94
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Book Description
The report presents the results obtained from the soniscope instrument for use in the nondestructive testing of portland-cement concrete pavements. Essentially, the instrument was tested to determine if consistent velocity measurements could be obtained with the transducers in a position vertical on the prestressed, reinforced, and plain concrete pavements. Also, of interest during the investigation was the maximum distance through portland-cement concrete for which consistent velocity measurements could be obtained. (Author).
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: Masayasu Ohtsu
Publisher: Woodhead Publishing
ISBN: 0128235144
Category : Technology & Engineering
Languages : en
Pages : 332
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Book Description
Acoustic Emission and Related Non-destructive Evaluation Techniques in the Fracture Mechanics of Concrete: Fundamentals and Applications, Second Edition presents innovative Acoustic Emission (AE) and related non-destructive evaluation (NDE) techniques that are used for damage detection and inspection of aged and deteriorated concrete structures. This new edition includes multi-modal applications such as DIC, thermography, X-ray and in-situ implementations, all of which are helpful in better understanding feasibility and underlying challenges. This new edition is an essential resource for civil engineers, contractors working in construction, and materials scientists working both in industry and academia. Completely updated, with a new chapter on multi-technique damage monitoring Presents new applications and novel technologies on AE and related NDT in the fracture mechanics of concrete Features contributions from recognized world-leaders in the application of acoustic emission (AE) and NDE techniques used for the damage assessment of concrete and concrete structures
Author: American Concrete Institute
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 714
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Book Description
Each number includes "Synopsis of recent articles."
Author:
Publisher: Transportation Research Board
ISBN: 0309129338
Category : Technology & Engineering
Languages : en
Pages : 96
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Book Description
" TRB's second Strategic Highway Research Program (SHRP 2) Report S2-R06A-RR-1: Nondestructive Testing to Identify Concrete Bridge Deck Deterioration identifies nondestructive testing technologies for detecting and characterizing common forms of deterioration in concrete bridge decks.The report also documents the validation of promising technologies, and grades and ranks the technologies based on results of the validations.The main product of this project will be an electronic repository for practitioners, known as the NDToolbox, which will provide information regarding recommended technologies for the detection of a particular deterioration. " -- publisher's description.
Author: Nuridah Sabtu
Publisher: Springer Nature
ISBN: 9819960185
Category : Science
Languages : en
Pages : 557
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Book Description
This book gathers the latest research, innovations, and applications in the field of civil engineering, as presented by leading national and international academics, researchers, engineers, and postgraduate students at the AWAM International Conference on Civil Engineering 2022 (AICCE’22), held in Penang, Malaysia on February 15-17, 2022. The book covers highly diverse topics in the main fields of civil engineering, including structural and earthquake engineering, environmental engineering, geotechnical engineering, highway and transportation engineering, water resources engineering, and geomatic and construction management. In line with the conference theme, “Sustainability And Resiliency: Re-Engineering the Future”, which relates to the United Nations’ 17 Global Goals for Sustainable Development, it highlights important elements in the planning and development stages to establish design standards beneficial to the environment and its surroundings. The contributions introduce numerous exciting ideas that spur novel research directions and foster multidisciplinary collaborations between various specialists in the field of civil engineering. This book is part of a 3-volume series of these conference proceedings, it represents Volume 2 in the series.
