Download or read book Development of Nondestructive Testing Systems for in Situ Evaluation of Concrete Structures written by A. Michael Alexander and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Nondestructive Testing Systems for in Situ Evaluation of Concrete Structures written by Henry T. Thornton and published by . This book was released on 1987 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Repair Evaluation Maintenance and Rehabilitation Research Program Development of Nondestructive Testing Systems for In Situ Evaluation of Concrete Structures written by and published by . This book was released on 1987 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: An effort was made to develop an ultrasonic pulse-echo system for the investigation and evaluation of the interior of concrete structures. The large pulse-echo transducer fabricated at Ohio State University (OSU) was obtained for study. Experimental transducers were fabricated and bandwidths were altered and optimized. Transducer area and frequency of operation were determined and various piezoelectric materials were studied; acoustic and electrical matching were employed to optimize signal strength and signal-to-noise (S/N) ratio. The final prototype transducers were constructed of lead metaniobate (EC-82) lead zirconate titanate (PZT-5H). The transducer area and mass was reduced by 90 percent and the S/N ratio was increased by 200 percent when compared with the OSU transducer. The pitch-catch prototype configuration was used to successfully measure the thickness of a 9-1/4-in. concrete test slab with a S/N ratio of 18. The system is presently useful for making thickness measurements on concrete pavements and floor slabs. Limited tests have shown that a metal plate and a plastic pipe can be located in a concrete slab of 9-in. thickness or less. Also, a thickness measurement was made on concrete by generating wideband acoustic (sonic and ultrasonic) energy by an impact hammer and detecting the echoes with a low Q resonant receiver centered at 180 kHz.
Download or read book Non Destructive Evaluation of Reinforced Concrete Structures Deterioration Processes and Standard Test Methods written by Christiane Maierhofer and published by Woodhead Publishing. This book was released on 2010-06 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Development of Procedures for Nondestructive Testing of Concrete Structures written by Henry T. Thornton and published by . This book was released on 1977 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Situ Nondestructive Testing of Concrete written by and published by . This book was released on 1984 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nondestructive Testing of Materials and Structures written by Oral Büyüköztürk and published by Springer Science & Business Media. This book was released on 2012-09-14 with total page 1231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Condition assessment and characterization of materials and structures by means of nondestructive testing (NDT) methods is a priority need around the world to meet the challenges associated with the durability, maintenance, rehabilitation, retrofitting, renewal and health monitoring of new and existing infrastructures including historic monuments. Numerous NDT methods that make use of certain components of the electromagnetic and acoustic spectrum are currently in use to this effect with various levels of success and there is an intensive worldwide research effort aimed at improving the existing methods and developing new ones. The knowledge and information compiled in this book captures the current state of the art in NDT methods and their application to civil and other engineering materials and structures. Critical reviews and advanced interdisciplinary discussions by world-renowned researchers point to the capabilities and limitations of the currently used NDT methods and shed light on current and future research directions to overcome the challenges in their development and practical use. In this respect, the contents of this book will equally benefit practicing engineers and researchers who take part in characterization, assessment and health monitoring of materials and structures.
Download or read book Non destructive Testing and Evaluation of Civil Engineering Structures written by Jean-Paul Balayssac and published by Elsevier. This book was released on 2017-11-22 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: The non-destructive evaluation of civil engineering structures in reinforced concrete is becoming an increasingly important issue in this field of engineering. This book proposes innovative ways to deal with this problem, through the characterization of concrete durability indicators by the use of non-destructive techniques. It presents the description of the various non-destructive techniques and their combination for the evaluation of indicators. The processing of data issued from the combination of NDE methods is also illustrated through examples of data fusion methods. The identification of conversion models linking observables, obtained from non-destructive measurements, to concrete durability indicators, as well as the consideration of different sources of variability in the assessment process, are also described. An analysis of in situ applications is carried out in order to highlight the practical aspects of the methodology. At the end of the book the authors provide a methodological guide detailing the proposed non-destructive evaluation methodology of concrete indicators. - Presents the latest developments performed in the community of NDT on different aspects - Provides a methodology developed in laboratory and transferred onsite for the evaluation of concrete properties which are not usually addressed by NDT methods - Includes the use of data fusion for merging the measurements provided by several NDT methods - Includes examples of current and potential applications
Download or read book Handbook on Nondestructive Testing of Concrete written by V. M. Malhotra and published by CRC Press. This book was released on 2004 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Civil engineers will value this resource that examines the tools and techniques used to estimate the in-place strength on concrete, permeation properties that relate to potential durability, and the methods used to assess the internal condition of concrete and the corrosion activity of steel reinforcement.
Download or read book Testing of Concrete in Structures written by John H. Bungey and published by CRC Press. This book was released on 2006-09-27 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a comprehensive overview of the techniques involved in testing concrete in structures, Testing of Concrete in Structures discusses both established techniques and new methods, showing potential for future development, and documenting them with illustrative examples. Topics have been expanded where significant advances have taken place in the field, for example integrity assessment, sub-surface radar, corrosion assessment and localized dynamic response tests. This fourth edition also covers the new trends in equipment and procedures, such as the continuation of general moves to automate test methods and developments in digital technology and the growing importance of performance monitoring, and includes new and updated references to standards. The non-specialist civil engineer involved in assessment, repair or maintenance of concrete structures will find this a thorough update.
Download or read book Non Destructive Testing And Evaluation For Manufacturing And Construction written by H. Dos Reis and published by CRC Press. This book was released on 1989-12-01 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring advances and strengthening communications among researchers in manufacturing and construction technologies, this book covers nondestructive testing and evaluation methods. Drawing on a wide range of experts, it provides insights from every sector of the field. Based on a three-day conference titled "Nondestructive Testing and Evaluation for Manufacturing and Construction" held on the campus of the University of Illinois at Urbana-Champaign, the papers presented in the book foster development of new and innovative methods.
Download or read book Report of Twelfth Interagency Research Coordination Conference written by and published by . This book was released on 1981 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Procedures for Nondestructive Testing of Concrete Structures Report 1 Present Practices written by Henry T Thornton (Jr) and published by . This book was released on 1977 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Concrete Laboratory (CL) has used nondestructive testing (NDT) in the evaluation of concrete and concreting materials. In recent years, more emphasis has been placed on the inspection and structural evaluation of completed Corps of Engineers structures. The need for a capability to predict, prior to placement, certain properties of concrete mixtures after hardening has been realized. This report discusses the history, progress to date, and needs for future research and development in the field of NDT.
Download or read book Development of Procedures for Nondestructive Testing of Concrete Structures written by A. Michel Alexander and published by . This book was released on 1980 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Procedures for Nondestructive Testing of Concrete Structures written by A. Michel Alexander and published by . This book was released on 1981 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of the resonant frequency technique as a method for evaluation of concrete structures is in progress. It is desirable that structures be evaluated in place, nondestructively, and in real time. The availability of digital Fourier analyzers and mathematical functions such as spectra, coherence, and transfer relationships permits the analysis of the behavior of large structures under dynamic conditions in place and in real time. An impact system has been tested which was proven more economical and versatile than the sinusoidal system currently in use. With transient loading, all frequencies are applied to the structure simultaneously rather than being swept through one at a time. Because the resonant frequency of a structure is directly related to its dynamic Young's modulus and hence its mechanical integrity, the resonant frequency technique is useful in the field as well as in the laboratory. Factors that influence the soundness and safety of a structure, such as modulus, continuity, and boundary conditions (i.e. foundation and other restraints) also directly affect the resonant frequency. Some limited work has been done with both mathematical and physical modeling to develop measurement criteria that will improve prediction of the expected resonant frequency for structures with varying geometries and varying degrees of foundation restraint. The characteristic vibrational signature of a structure may be evaluated at selected time intervals in an effort to predict service life. Improvement in modal analysis and prediction of frequencies by mathematical modeling is needed. Field work has demonstrated the feasibility of the technique. (Author).
Download or read book International Advances in Nondestructive Testing written by Warren J. McGonnagle and published by CRC Press. This book was released on 1991 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents original research in the broad areas of technical design and nondestructive testing procedures. It provides critical information for managers, materials scientists, quality control specialists and engineers who must stay abreast of rapidly advancing methods for the detection and measurement of the performance capabilities for parts, equipment and structures. Papers of special interest to the aircraft, nuclear and automotive industries include adhesive bonding of lap joints, nuclear radiography, nuclear tomography, use of hte leaky lamb wave technique to determine the dynamic elastic moduli of a fiber-reinforced composite, and a comparison of the resonant technique with the impact-echo technique.
Download or read book Development of an Advanced Automated Nondestructive Evaluation System for Investigation of Concrete Structures and Validation of Concrete NDE Instruments written by Jordan D. Nelson and published by . This book was released on 2013 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nondestructive evaluation (NDE) of concrete has historically been a niche discipline within civil engineering and a process carried out by an individual operator in the field to evaluate the extent of known or suspected flaws within a concrete structure. NDE techniques such as Ground Penetrating Radar, Ultrasound, and Eddy Current methods depend heavily on the expertise and diligence of the operator to maintain accuracy and are prone to producing sparse, subjective data. In recent years the Florida Department of Transportation (FDOT) has called for NDE techniques to be applied in an automated manner to produce denser, more precise, and more defensible data suitable for structural evaluation and quality control in a variety of applications. This body of work chronicles the development of such a system for use by FDOT: a precision automated scanning system coupled with state-of-the-art NDE instruments, standardized laboratory evaluation specimens, and purpose-built operation and data processing software that together comprise the FDOT Automated Non Destructive Testing for Applied Research and Evaluation of Structures (ANTARES) system.
