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Author : J. Peter Ault
Publisher :
ISBN 13 : 9780309390361
Total Pages : 75 pages
Book Rating : 4.3/5 (93 download)
Download or read book Corrosion Prevention for Extending the Service Life of Steel Bridges written by J. Peter Ault and published by . This book was released on 2018 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tom W. Neal
Publisher : Transportation Research Board
ISBN 13 : 9780309061148
Total Pages : 100 pages
Book Rating : 4.0/5 (611 download)
Download or read book Maintenance Issues and Alternate Corrosion Protection Methods for Exposed Bridge Steel written by Tom W. Neal and published by Transportation Research Board. This book was released on 1998 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to state department of transportation (DOT) bridge maintenance engineers, coating specialists, chemists, and researchers. Manufacturers and suppliers of corrosion protection products and systems for exposed structural steel on existing bridges will also find it of interest. This synthesis describes current practice regarding maintenance and protection strategies for exposed structural steel on existing bridges. NCHRP Synthesis 251, Lead-Based Paint Removal for Steel Highway Bridges ( 1997), provides a complementary and more in-depth treatment of maintenance issues involving lead-based paint removal. This report of the Transportation Research Board defines the maintenance management systems and decision making criteria used by transportation agencies for maintaining exposed bridge steel. Material selection criteria, surface preparation and application practices, quality control and quality assurance programs, and funding mechanisms are discussed in detail. The impact of recent and proposed environmental and worker protection regulations on current practice is reported. Information for the synthesis was collected by surveying state transportation agencies and by conducting a literature search. Responses to the survey, Appendix C to this document, are published on the Internet as NCHRP Web Document 11.
Author : Julie Giannino
Publisher :
ISBN 13 :
Total Pages : 238 pages
Book Rating : 4.7/5 (86 download)
Download or read book Durability of Steel Bridge Corrosion Protection Systems Using Field Data and Laboratory Testing written by Julie Giannino and published by . This book was released on 2022 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion is the greatest problem facing steel bridges today. Corrosion is caused by the interaction of steel and atmospheric conditions. It can be prevented by adding a protective layer to the steel or by using a protective steel, collectively known as corrosion protection systems. The purpose of this study is to evaluate the performance of six of the most common corrosion protection systems: uncoated weathering steel (UWS), uncoated stainless steel, galvanizing, metallizing, 1-coat inorganic zinc paint, and a 3-coat organic zinc paint system, in relatively corrosive environments. The severely corrosive environments considered in this research are coastal environments where natural chlorides are present and environments where chlorides are present via the high use of deicing salts. Performance was evaluated first through a statistical analysis of existing field data and subsequently through implementation of laboratory accelerated corrosion testing on each of the corrosion protection systems for 80 cycles, representing 80 years in the field. The statistical analysis of field data showed the relative ranking in order of descending performance to be: galvanizing, UWS, then paint, with metallizing having variable performance over different age ranges; this ranking was affirmed by longevity estimates determined through laboratory testing when lower, more conservative percent mass loss and percent rusted benchmarks were used to determine the longevity estimates. Stainless steel corroded more than expected during laboratory testing and requires further investigation. The implications of the longevity estimates show that steel can provide a long service life even in a relatively severe environment. Use of any of these corrosion protection systems can improve performance, increase service life, decrease required maintenance, and provide economical steel bridges.
Author : Michael Carey Brown
Publisher :
ISBN 13 :
Total Pages : 63 pages
Book Rating : 4.:/5 (532 download)
Download or read book Corrosion Protection Service Life of Epoxy-coated Reinforcing Steel in Virginia Bridge Decks written by Michael Carey Brown and published by . This book was released on 2003 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: The corrosion protection service life extension provided by epoxy-coated reinforcement (ECR) was determined by comparing ECR and bare steel bars from 10 Virginia bridge decks built between 1981 and 1995. The objective was to determine the corrosion protection service life time extension provided by ECR field specimens with various degrees of coating adhesion: disbonded, partially disbonded, and wholly bonded coatings. The size and length distributions of cracks in Virginia bridge decks were investigated to assess the frequency and severity of cracks. Correlation of cracks with chloride penetration was used to characterize the influence of cracking on deck deterioration. Cracks influence the rate of chloride penetration, but the frequency and width distributions of cracks indicate that cracks are not likely to shorten the overall service life of most bridge decks in Virginia. Altogether, 141 drilled cores, 102 mm (4 inches) in diameter, were employed in this study. For each of the decks built with ECR, 10 to 12 cores were drilled through a top reinforcing bar adjacent to the previous study core locations. In addition, approximately 3 cores were drilled through a top reinforcing bar at a surface crack location. Laboratory testing involved nondestructive monitoring using advanced electrochemical techniques to periodically assess the corrosion state of the steel bars during cyclic exposure to chloride-rich solution over 36 months of treatment. Time of corrosion initiation and time of cracking (where applicable), as well as chloride content of the concrete before and after treatment, were used in the analysis. Analysis of the epoxy coating after treatment showed the presence of micro cracks in the surface of some coatings, and moisture uptake and glass transition temperatures, as related to curing of the coatings, were investigated. Less than 25 percent of all Virginia bridge decks built under specifications in place since 1981 is projected to corrode sufficiently to require rehabilitation within 100 years, regardless of bar type. The corrosion service life extension attributable to ECR in bridge decks was found to be approximately 5 years beyond that of bare steel and, therefore, ECR is not a cost-effective method of corrosion prevention for bridge decks. Deleting the requirement for ECR in decks would save Virginia approximately $845,000 per year.
Author : Ali Akbar Sohanghpurwala
Publisher : Transportation Research Board
ISBN 13 : 0309098629
Total Pages : 72 pages
Book Rating : 4.3/5 (9 download)
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. This book was released on 2006 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Peter Ault
Publisher :
ISBN 13 : 9780309698788
Total Pages : 0 pages
Book Rating : 4.6/5 (987 download)
Download or read book Corrosion Protection of Steel Bridges Using Duplex Coating Systems written by J. Peter Ault and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report presents recommendations for the use of duplex coatings for corrosion protection of new and existing steel bridges. These recommendations are based on case studies, laboratory testing, and users' input. The recommendations provide bridge owners and practitioners with a resource to help increase the service life of coated steel bridges." -- publisher's website
Author : MC. Brown
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (125 download)
Download or read book Service Life Extension of Virginia Bridge Decks Afforded by Epoxy-Coated Reinforcement written by MC. Brown and published by . This book was released on 2006 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted on concrete core samples each containing a single top-mat reinforcing steel bar from ten bridge decks in Virginia. Two of the bridges contained conventional, uncoated mild reinforcing steel (Bare), and eight of the bridges were constructed with epoxy-coated reinforcement (ECR). The bridges ranged in age from 4 to 18 years, and were built under same specifications for concrete water-to-cement ratio (w/c) and cover depth. In the laboratory, the subject cores were prepared and corrosion activity was monitored via electrochemical impedance spectroscopy while subject to cyclic ponding of a 3 % NaCl solution over a 22-month exposure period. The relative corrosion performance of the Bare and ECR bars were evaluated, by comparison of the time to corrosion initiation and time to failure, as designated by visible cracking of the concrete cover. A stochastic model was employed, using bootstrap resampling techniques, to project the corrosion protection service life extension provided by epoxy-coated reinforcement as compared to Bare steel for the population of Virginia bridge decks. Less than 25 % of all Virginia bridge decks built under specifications in place since 1981 were projected to corrode sufficiently to require rehabilitation within 100 years, regardless of bar type. The corrosion service life extension attributable to ECR in bridge decks was found to be approximately 5 years beyond that of Bare steel.
Author : Tianna Szanyi
Publisher :
ISBN 13 :
Total Pages : 314 pages
Book Rating : 4.:/5 (362 download)
Download or read book Steel Bridge Service Life Predictions from Corrosion Rates written by Tianna Szanyi and published by . This book was released on 1995 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William C. Johnson
Publisher :
ISBN 13 : 9780938477518
Total Pages : 123 pages
Book Rating : 4.4/5 (775 download)
Download or read book FHWA Guide to Bridge Maintenance Painting written by William C. Johnson and published by . This book was released on 1987 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. Albrecht
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (125 download)
Download or read book Corrosion Control of Weathering Steel Bridges written by P. Albrecht and published by . This book was released on 1992 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bare exposed weathering steel is an economical alternative to ordinary painted steel if the weathering steel develops a protective oxide coating, meaning that the bridge need not be painted during its service life. To ensure satisfactory corrosion performance, engineers should follow the guidelines for the use of weathering steel in bridges described in this paper.
Author : MM. Lwin
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (125 download)
Download or read book Zinc-Plus-Paint System for Corrosion Protection of a Steel Bridge written by MM. Lwin and published by . This book was released on 1984 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel bridges are commonly protected from corrosion by the use of weathering steel (unpainted), paints, or zinc. The use of zinc and paints in combination has not received much attention in bridge construction. This paper describes the factors influencing the selection of a zinc-plus-paint system for corrosion protection of the structural low-alloy steel lift spans of the Hood Canal Floating Bridge. This bridge is situated in a marine environment and is designed to have a service life of 75 years.
Author : Robert Frosch
Publisher :
ISBN 13 : 9781622603343
Total Pages : pages
Book Rating : 4.6/5 (33 download)
Download or read book Increasing Bridge Deck Service Life written by Robert Frosch and published by . This book was released on 2014-12-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research program was to examine the efficacy of using alternative materials in a bridge deck from both technical and economic perspectives. For the technical evaluation (Volume 1), a three phase experimental investigation was conducted considering a wide range of corrosion-resistant reinforcing materials. These materials included stainless steels, microcomposite steel, and coated steels considering a variety of metallic and nonmetallic coatings. The first phase evaluated the bond between corrosion-resistant reinforcement and concrete using lap splice tests. The second phase evaluated the cracking behavior of slabs reinforced with corrosion-resistant reinforcement. Finally, the third phase evaluated corrosion resistance under uncracked and cracked conditions using macrocell test specimens. Transverse steel was also tied to the longitudinal steel to simulate actual bridge deck conditions. Recommendations are provided on development and splice lengths for both conventional black and corrosion-resistant reinforcing steel, control of cracks widths, as well as the selection, design, and construction of corrosion-resistant reinforcement. For the economic evaluation (Volume 2), a decision support methodology and associated spreadsheet tool for robust analysis of the cost-effectiveness of alternative material types for bridge deck reinforcement was developed. The two evaluation criteria are agency and user costs, and the input data that influence this criteria include the deck service life, material process, discount rate, detour length, and bridge size. The methodology incorporates analytical techniques that include life cycle analyses to evaluate the long-term cost and benefits of each material over the bridge life; Monte Carlo simulation to account for the probabilistic nature of the input variables; stochastic dominance to ascertain the probability distribution of the outcome that a specific reinforcement material is superior to others; and analytical hierarchical process to establish appropriate weights for the agency and user costs. Methodology is demonstrated using a case study involving three reinforcement material alternatives: traditional (epoxy-coated) steel, zinc-clad steel, and stainless steel. Through this study, it is demonstrated that the use of corrosion-resistant reinforcing materials can significantly increase bridge deck life, reduce agency and user costs associated with bridge deck rehabilitation and maintenance, and thus lower the financial needs for long-term preservation of bridges.
Author : Ricardo Rafael De Rojas Pando De Rojas
Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.:/5 (494 download)
Download or read book New Developments in Steel Reinforcement Protection from Corrosion written by Ricardo Rafael De Rojas Pando De Rojas and published by . This book was released on 2001 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert A. Kogler
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.3/5 (121 download)
Download or read book Environmentally Acceptable Materials for the Corrosion Protection of Steel Bridges written by Robert A. Kogler and published by . This book was released on 1997 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recently promulgated environmental regulations concerning volatile organic compounds (VOC) and certain hazardous heavy metals have had a great impact on the bridge painting industry. As a response to these regulations, many of the major coating manufacturers now offer "environmentally acceptable" alternative coating systems to replace those traditionally used on bridge structures. The Federal Highway Administration sponsored a 7-year study to determine the relative corrosion control performance of these newly available coating systems. The most promising coating systems were selected for long-term field evaluation based on accelerated test performance. The long-term exposure testing was conducted for 5 years in three marine locations. Panels were exposed on two bridges, one in New Jersey and one in southern Louisiana. The third long-term exposure location was in Sea Isle City, New Jersey. Thirteen coating systems were included for long-term exposure testing.
Author :
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (1 download)
Download or read book Bridge Deck Service Life Prediction and Costs written by and published by . This book was released on 2007 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The service life of Virginia's concrete bridge decks is generally controlled by chloride-induced corrosion of the reinforcing steel as a result of the application of winter maintenance deicing salts. A chloride corrosion model accounting for the variable input parameters using Monte Carlo resampling was developed. The model was validated using condition surveys from 10 Virginia bridge decks built with bare steel. The influence of changes in the construction specifications of w/c = 0.47 and 0.45 and w/cm = 0.45 and a cover depth increase from 2 to 2.75 inches was determined. Decks built under the specification of w/cm = 0.45 (using slag or fly ash) and a 2.75 inch cover depth have a maintenance free service life of greater than 100 years, regardless of the type of reinforcing steel. Galvanized, MMFX-2, and stainless steel, in order of increasing reliability of a service life of greater than 100 years, will provide a redundant corrosion protection system. Life cycle cost analyses were conducted for polymer concrete and portland cement based overlays as maintenance activities. The most economical alternative is dependent on individual structure conditions. The study developed a model and computer software that can be used to determine the time to first repair and rehabilitation of individual bridge decks taking into account the time for corrosion initiation, time from initiation to cracking, and time for corrosion damage to propagate to a state requiring repair.
Author : F. C. Campbell
Publisher : ASM International
ISBN 13 : 1615039767
Total Pages : 699 pages
Book Rating : 4.6/5 (15 download)
Download or read book Fatigue and Fracture written by F. C. Campbell and published by ASM International. This book was released on 2012-01-01 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book emphasizes the physical and practical aspects of fatigue and fracture. It covers mechanical properties of materials, differences between ductile and brittle fractures, fracture mechanics, the basics of fatigue, structural joints, high temperature failures, wear, environmentally-induced failures, and steps in the failure analysis process."--publishers website.
Author : G. W. Maupin
Publisher : ASTM International
ISBN 13 : 0803114028
Total Pages : 138 pages
Book Rating : 4.8/5 (31 download)
Download or read book Extending the Life of Bridges written by G. W. Maupin and published by ASTM International. This book was released on 1990 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
