Download or read book Use of Vertical Electrical Impedance for Nondestructive Evaluation of Concrete Bridge Decks written by Enoch Thomas Boekweg and published by . This book was released on 2021 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: An additional study was performed on a newly constructed bridge deck in Midvale, Utah, that was subject to an unexpected rainstorm during construction. Several forms of nondestructive testing, including VEI testing, were performed on the deck. Statistical analysis of the tests permitted assessment of the bridge deck. Comparing VEI testing with these other NDT methods has not been done before, and the results of this work will assist those who are unfamiliar with VEI with interpretation of VEI data in the context of other, more typical NDT techniques.
Download or read book Vertical Electrical Impedance Measurements on Concrete Bridge Decks Using a Large area Electrode written by Jeffrey David Barton and published by . This book was released on 2018 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: In regions where chloride-based deicing salts are applied to bridge decks, corrosion of the interior steel reinforcement is a major problem. Vertical electrical impedance (VEI) is an effective measurement technique to quantitatively assess the cover protection on bridges against aggressive chemical penetration of reinforced concrete. In its current form, traditional vertical electrical impedance is time-consuming and destructive because a direct connection to the reinforcing steel is required to provide a ground reference. A new method using a large-area electrode (LAE) permits VEI measurement without a direct electrical connection to the steel reinforcement. The LAE creates a nondestructive, semi-direct, low impedance connection between the measurement electronics and the reinforcing steel.
Download or read book Vertical Electrical Impedance Measurements of Concrete Bridge Decks written by Jared Scott Baxter and published by . This book was released on 2019 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research focuses on the creation, validation, automation, and deployment of a nondestructive vertical electrical impedance (VEI) bridge deck assessment apparatus. A multichannel impedance analyzer with a moving platform is developed that can assess the deterioration state of a bridge deck without stationary traffic control. The multichannel apparatus is capable of taking over 500 impedance samples a second and can scan a bridge deck over 500 times faster than more traditional techniques. This research also shows VEI measurements are inversely proportional to the diffusivity of ions through concrete and that an impedance measurement frequency of 25 kHz is the most predictive measurement frequency of diffusivity. Finally, this research demonstrates the utility of VEI measurements by inspecting five asphalt overlaid bridges. VEI measurements were sensitive to defects in membranes and are one of the only nondestructive measurements that provide useful information about the deterioration state of asphalt overlaid bridge decks.
Download or read book Nondestructive Evaluation of Bridges and Highways written by and published by . This book was released on 1996 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nondestructive Testing to Identify Concrete Bridge Deck Deterioration written by and published by Transportation Research Board. This book was released on 2013 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: " 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.
Download or read book Nondestructive Evaluation of Bridges and Highways III written by Steve B. Chase and published by SPIE-International Society for Optical Engineering. This book was released on 1999 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sensitivity of Electrochemical Impedance Spectroscopy Measurements to Concrete Bridge Deck Properties written by Hillary McKenna Argyle and published by . This book was released on 2014 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the uncontrolled laboratory experiments, a single frequency of 200 Hz was selected for impedance testing. Statistical analyses were performed to compare impedance with more traditional test measurements relating to corrosion of reinforcing steel in concrete bridge decks. Longitudinal and transverse cover, dry and wet resistivity, dry and wet half-cell potential, dry linear polarization, and chloride concentration were determined to be correlated with impedance, with p-values less than 0.15.
Download or read book Non destructive Testing of Wisconsin Highway Bridges written by Alireza Ghorbanpoor and published by . This book was released on 2005 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eco efficient Repair and Rehabilitation of Concrete Infrastructures written by Fernando Pacheco-Torgal and published by Elsevier. This book was released on 2024-03-22 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eco-efficient Repair and Rehabilitation of Concrete Infrastructures, Second Edition provides an updated state-of-the-art review on the latest advances in this important research field. The first section is brought fully up-to-date and focuses on deterioration assessment methods. Section two contains brand new chapters on innovative concrete repair and rehabilitation materials including: fly ash-based alkali-activated repair materials for concrete exposed to aggressive environments; repairing concrete structures with alkali-activated metakaolin mortars; concrete with micro encapsulated self-healing materials; concrete repaired with bacteria; concrete structures repaired with engineered cementitious composites; concrete repaired by electrodeposition; the assessment of concrete after repair operations and durability of concrete repair. The final section has also been amended to include six new chapters on design, Life-cycle cost analysis and life-cycle assessment. These chapters include maintenance strategies for concrete structures; a comparison of different repair methods; life cycle assessment of the effects of climate change on bridge deterioration; life-cycle-cost benefits of cathodic protection of concrete structures; life-cycle cost analyses for concrete bridges exposed to chlorides and life-cycle analysis of repair of concrete pavements. The book will be an essential reference resource for materials scientists, civil and structural engineers, architects, structural designers and contractors working in the construction industry. Covers the latest research findings on eco-efficient repair and rehabilitation of concrete infrastructures Provides comprehensive coverage from damage detection and assessment, to repair strategies and structural health monitoring Presents a diverse author base that offers insights on construction practice and employed technologies worldwide Includes an entire section on NDT, innovative repair, and rehabilitation materials, as well as case studies on lifecycle cost analysis and lifecycle assessment
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 Applications of Electrical Impedance Tomography to Nondestructive Evaluation written by Fadil Santosa and published by . This book was released on 1995 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Development and Use of an Automated Device for Nondestructive Sonic ultrasonic Testing of Bridge Deck Concrete written by NDT Engineering (Shrewsbury, MA) and published by . This book was released on 2000 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research, development fabrication and testing, of an automated sonic/ultrasonic device and the techniques for the evaluation of deck concrete have been completed successfully. Seven bridge decks; six asphalt covered and one bare deck were tested and compared to conditions outlined for repair. In addition, 7 bare and 5 asphalt covered bridge deck sections at the Federal Highway Administration McLean, VA facility were tested. Two of these deck sections were poured at the site and 10 were saw cut, removed, and transported to the McLean site. Buried defects were put into the two sections poured at the site, these were successfully identified by the sonic/ultrasonic technique.
Download or read book An Annotated Bibliography of Nondestructive Testing of Concrete 1975 1984 written by N. G. Zoldners and published by CANMET. This book was released on 1985 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This annotated bibliography, chronologically arranged, compilesliterature published form 1975 to 1984 on innovations andmodifications of non-destructive methods used for the testing ofconcrete. Attention was focused on the new methods used formonitoring concrete deterioration, crack development, andcorrosion of reinforcement bars.
Download or read book ACI 228 2R 13 Report on Nondestructive Test Methods for Concrete in Structures written by American Concrete Institute and published by . This book was released on 2013 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A review is presented of nondestructive test (NDT) methods for evaluating the condition of concrete and steel reinforcement in structures. Methods discussed include visual inspection, stress-wave, nuclear, measurement of fluid transport properties, magnetic and electrical, infrared thermography, and ground-penetrating radar. The principle of each method is discussed and the typical instrumentation described. Testing procedures are summarized and the data analysis methods explained. The advantages and limitations of the methods are highlighted. This report concludes with a discussion of planning a NDT program. General information is provided for those faced with the tast of evaluating the condition of a concrete structure and who are considering the applicability of NDT methods to aid in that evaluation."--p. 1.
Download or read book Bridge Decks written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board Commission. This book was released on 1976 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1982-12 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
