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Evaluation Of Cathodic Protection In Reinforced Concrete Bridges
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Book Synopsis Evaluation of Cathodic Protection in Reinforced Concrete Bridges by : Farid Abooameri
Download or read book Evaluation of Cathodic Protection in Reinforced Concrete Bridges written by Farid Abooameri and published by . This book was released on 1994 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel corrosion in reinforced concrete is a major concern to transportation agencies nationwide because of the expenses incurred for repair and ultimate shortening of bridge life. Cathodic protection (CP), as a remedy, has been applied to reinforced bridges in the US since 1974. However, application of this technique is largely empirical, lacking fundamental understanding. In order to optimize the performance of a CP system, it is important to monitor the rebar potential with respect to a reliable reference electrode. Moreover, because of potential variation in the concrete, reference cell placement is fundamental to ensure effective protection. The work plan was divided into two parts: laboratory scale experimentation and computer simulation. In the experimentation section, the response of graphite probes was compared to that of an Orion silver-silver chloride electrode. Graphite probes behaved as well as the standard electrode. Furthermore, the home-made graphite probes behaved the same as the commercial ones. This will allow much greater experimental latitude since the home-made probes are much more economical than the commercial ones. A finite difference code was developed to assess the performance of cathodic protection. The potential distribution in a two dimensional geometry of a concrete block with a sprayed zinc anode at one boundary and an iron cathode at the other side was calculated under cathodic protection. The equations were solved by means of a Gauss-Seidel iterative method with the help of an overrelaxation factor. An interval halving method was used to solve for nonlinear boundary condition at the iron. The effects of concrete pore saturation, concrete cover, and applied potential were studied to determine the degree of protection and proper placement of the reference electrode in concrete. Furthermore, a sensitivity analysis was performed versus input parameters: concrete conductivity, oxygen mass transfer coefficient, and oxygen reduction polarization parameters. The results of the simulation showed that the center of the rebar is less protected than the other locations. Therefore, the reference electrode should be located as close to the center as possible.
Book Synopsis Evaluation of Select Methods of Corrosion Control, Corrosion Prevention, and Repair in Reinforced Concrete Bridges by : Habib Tabatabai
Download or read book Evaluation of Select Methods of Corrosion Control, Corrosion Prevention, and Repair in Reinforced Concrete Bridges written by Habib Tabatabai and published by . This book was released on 2009 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Galvanic Cathodic Protection for Reinforced Concrete Bridge Decks by : David Whiting
Download or read book Galvanic Cathodic Protection for Reinforced Concrete Bridge Decks written by David Whiting and published by Transportation Research Board National Research. This book was released on 1981 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Galvanic Cathodic Protection for Reinforced Concrete Bridge Decks by :
Download or read book Galvanic Cathodic Protection for Reinforced Concrete Bridge Decks written by and published by . This book was released on 1964 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Galvanic Cathodic Protection for Reinforced Concrete Bridge Decks by : Arlee T. Reno
Download or read book Galvanic Cathodic Protection for Reinforced Concrete Bridge Decks written by Arlee T. Reno and published by . This book was released on 1964 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Corrosion Protection Methods for Reinforced Concrete Highway Structures by : Jennifer L. Kepler
Download or read book Evaluation of Corrosion Protection Methods for Reinforced Concrete Highway Structures written by Jennifer L. Kepler and published by . This book was released on 2000 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the 1970s, research projects and field studies have been conducted on different methods for protecting reinforced concrete bridges from corrosion damage. The methods include alternative reinforcement and slab design, barrier methods, electrochemical methods, and corrosion inhibitors. Each method and its underlying principles are described, performance results of laboratory and/or field trials are reviewed, and systems are evaluated based on the results of the trials. Using performance results from the studies and costs obtained from transportation agencies, an economic analysis is used to estimate the cost of each system over a 75-year economic life using discount rates of 2%, 4% and 6%.
Book Synopsis Cathodic Protection for Reinforced Concrete Bridge Decks by : John B. Vrable
Download or read book Cathodic Protection for Reinforced Concrete Bridge Decks written by John B. Vrable and published by Transportation Research Board National Research. This book was released on 1977 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Bibliography on the Corrosion and Protection of Steel in Concrete by : E. Escalante
Download or read book A Bibliography on the Corrosion and Protection of Steel in Concrete written by E. Escalante and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Corrosion of Steel in Concrete by : John P. Broomfield
Download or read book Corrosion of Steel in Concrete written by John P. Broomfield and published by CRC Press. This book was released on 2023-01-31 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of Steel in Concrete: Understanding, Investigation and Repair is a guide for designing, constructing and maintaining reinforced concrete structures, such as buildings and bridges which are subject to reinforcement corrosion. It presents the basics of theory and practice in steel corrosion in concrete and reviews the latest research and developments, such as progress on measuring the corrosion threshold for chloride-induced corrosion. This third edition compares the currently proliferating major national and international standards and guidance documents. New developments are considered, such as hybrid anodes for electrochemical treatment and the latest research and developments in assessment, such as the use of ground penetrating radar to measure the chloride content of the concrete cover. It overhauls coverage of electrochemical repair and rehabilitation techniques and outlines recent innovations in structural repair and construction and investigates their implications for durability. The book is ideal for practitioners and graduate students in structural engineering and concrete technology.
Book Synopsis Evaluation of Bridge Deck Cathodic Protection by : Carey L. Younger
Download or read book Evaluation of Bridge Deck Cathodic Protection written by Carey L. Younger and published by . This book was released on 1994 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluations of Sacrificial Anodes for Cathodic Protection of Reinforced Concrete Bridge Decks by : David Whiting
Download or read book Evaluations of Sacrificial Anodes for Cathodic Protection of Reinforced Concrete Bridge Decks written by David Whiting and published by . This book was released on 1995 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory evaluations were carried out on a series of anode materials, including aluminum, magnesium, and zinc alloys. Anode/steel couples were placed in simulated concrete environments consisting of sealed containers filled with silica sand treated with a mixed alkali-chloride solution. Measurements of current flow, circuit resistance, potential, and depolarization were made over a period of 18 weeks. Based on results obtained, aluminum and zinc anodes were found to hold the most promise for use as galvanic anodes in reinforced concrete bridge decks. A series of reinforced concrete test slabs were produced for evaluation of the candidate materials. Normal-weight structural concrete, structural lightweight concrete, free-draining concrete, and free-draining latex-modified concrete overlays were placed over the anodes to serve as riding surfaces. Performance of the cathodic protection (CP) systems was evaluated using current flow and depolarization techniques.
Book Synopsis Long-term Performance of Corrosion Inhibitors Used in Repair of Reinforced Concrete Bridge Components by : Moavin Islam
Download or read book Long-term Performance of Corrosion Inhibitors Used in Repair of Reinforced Concrete Bridge Components written by Moavin Islam and published by DIANE Publishing. This book was released on 2003 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the project was to determine the effectiveness of cathodic protection, electrochemical chloride extraction, and corrosion-inhibitor treatment systems installed during the SHRP effort through the long-term evaluation of 32 field test sites and a number of laboratory concrete slab specimens. The FHWA program required monitoring the long-term performance of corrosion inhibitor treatments on selected components of four bridges that were treated and evaluated under SHRP C-103. Three evaluations over a period of 5 years were conducted on structures located in Minnesota, New York and Pennsylvania, and two evaluations were conducted on a structure in Washington State. An analysis of the results concluded that neither of the corrosion inhibitors evaluated in this study, using the specified repairs and exposed to the specific environments, provided any corrosion-inhibiting benefit. Shrinkage cracking plagued repairs at all test sites except for the Washington site.
Book Synopsis Performance Evaluation of Various Corrosion Protection Systems of Bridges in Colorado by : Yunping Xi
Download or read book Performance Evaluation of Various Corrosion Protection Systems of Bridges in Colorado written by Yunping Xi and published by . This book was released on 2004 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of reinforced concrete structures has been a significant problem for many state and transportation agencies since the application of deicing salts was introduced. Much research has been conducted to develop corrosion protection systems that can prolong the life span of reinforced concrete structures. The Colorado Department of Transportation (CDOT) has several routine and experimental measures to prevent corrosion of the rebar including epoxy-coated rebar, calcium nitrite admixture, organic corrosion inhibitors, a thick cover of quality concrete, and a waterproofing membrane covered by an asphalt overlay. An extensive literature review was performed to collect information on various corrosion protection systems that have been used in the U.S. and around the world. Current CDOT practices in terms of corrosion protection measures were reviewed. A draft inspection plan for Colorado's bridge structures was proposed.
Author :Ali Akbar Sohanghpurwala Publisher :Transportation Research Board National Research ISBN 13 : Total Pages :76 pages Book Rating :4.:/5 (1 download)
Book Synopsis Manual on Service Life of Corrosion-damaged Reinforced Concrete Bridge Superstructure Elements by : Ali Akbar Sohanghpurwala
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 National Research. This book was released on 2006 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cathodic Protection of Concrete Bridges by : Jack E. Bennett
Download or read book Cathodic Protection of Concrete Bridges written by Jack E. Bennett and published by Strategic Highway Research Program (Shrp). This book was released on 1993 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides explanation, guidance, and direction concerning cathodic protection of concrete bridge elements to the highway engineer who wants to incorporate cathodic protection in a bridge project. The manual which provides background information on corrosion fundamentals, is divided into 3 parts: design, construction, and operation and maintenance. An appendix provides standard specifications for cathodic protection systems for both decks and substructures. The document is intended to be a useful reference for engineers who design and prepare specifications or who oversee turnkey operations.
Book Synopsis Steel-Reinforced Concrete Structures by : Mohamed Abdallah El-Reedy
Download or read book Steel-Reinforced Concrete Structures written by Mohamed Abdallah El-Reedy and published by CRC Press. This book was released on 2017-11-06 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Proceedings of the Conference on Cathodic Protection of Reinforced Concrete Bridge Decks, San Antonio, Texas, February 12-13, 1985 by :
Download or read book Proceedings of the Conference on Cathodic Protection of Reinforced Concrete Bridge Decks, San Antonio, Texas, February 12-13, 1985 written by and published by . This book was released on 1985 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conference focused on the major problem facing highway and bridge engineers: deterioration of concrete bridge decks caused by corrosion of the reinforcing steel. The conference was aimed primarily at giving bridge owners and engineers an understanding of cathodic protection as the only means to stop corrosion on bridge decks.
