Download or read book Performance evaluation of one coat systems on new steel bridges written by and published by . This book was released on 2011 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Durable Coating Systems for Steel Bridges written by Margaret S. Criswell and published by Nova Science Publishers. This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Federal Highway Administration 100-Year Coating Study was initiated in August 2009 to identify coating systems that can provide 100 years of virtually maintenance-free service life at comparable costs to the existing coating systems, even in adverse environments. This book focuses on the study and discusses the performance evaluation of one-coat systems for new steel bridges.

Download or read book Durable Coating Systems for Steel Bridges written by Margaret S. Criswell and published by . This book was released on 2013 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Federal Highway Administration 100-Year Coating Study was initiated in August 2009 to identify coating systems that can provide 100 years of virtually maintenance-free service life at comparable costs to the existing coating systems, even in adverse environments. This book focuses on the study and discusses the performance evaluation of one-coat systems for new steel bridges.

Download or read book Maintenance Painting for Steel Bridges written by Christopher Wolfgram and published by . This book was released on 2019 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project was to identify efficient and cost-effective methodologies for maintenance painting of steel bridges for MnDOT bridge crews to extend the service life of the coating system by at least five years before complete coating rehabilitation would be warranted. Five generic coating systems, chosen for their compatibility with existing MnDOT coating systems and minimal requirements for surface preparation and application, were applied over minimally prepared surfaces on two St. Paul bridges. Coating performance was evaluated annually over a three-year period through visual field observation following the MnDOT Steel Bridge Coating Condition Assessment Photographic Field Guide and MnDOT Bridge and Structure Inspection Program Manual. Adhesion testing was performed in accordance with ASTM D3359 in conjunction with the third-year evaluation. The results were photographed and documented in a matrix, identifying key performance characteristics. The predominant failure affecting two of the coating systems was delamination due to application over an anti-graffiti finish coat. Otherwise, each system performed to a standard aligning with the pre-established project goal for expanded serviceability of five years. Because developing a Bridge Maintenance Coating Program requires critical timing in the inspection process to identify existing coating condition, a Bridge Coating Repair Reference Table was developed to assist MnDOT crews with determining the appropriate preventive maintenance painting strategy based on condition and existing coating system. This work also determined that surface conditions demonstrating pitting with rusting, or surfaces with an anti-graffiti coating should not be addressed through maintenance painting but instead should be considered for coating removal and replacement.

Download or read book Environmentally Acceptable Materials for the Corrosion Protection of Steel Bridges written by 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.

Download or read book Structural Steel Coatings for Corrosion Mitigation written by John Joseph Myers and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Task 1 of this project was to survey the performance of coating systems for steel bridges in Missouri and to evaluate coating and recoating practices. Task 1 was led under the direction of Dr. Glenn Washer from the University of Missouri located in Columbia, MO. A specific literature review focused on current state-of-the-practice for overcoatings, bridge coating assessment and rating, deterioration rate modeling as well as the risk assessment for overcoating. A new coating evaluation guideline was created to meet the needs of bridge maintenance in Missouri. Finally a field survey was carried out onto the existing bridge coatings across 10 Missouri Department of Transportation (MoDOT) districts and 26 counties. It was found that system S and G perform very well in many of the situations observed. The survey indicated that in many cases system S overcoatings are providing service life extension for the coating system, with some early failures resulting from severe exposure to deck drainage and corrosion. Deck condition, drainage, and joint conditions were found to be the dominate factor in deterioration of the coating system, regardless of the age of the coating. Task 2 of this project investigated the performance of new types of coating technologies on bridge corrosion mitigation and was led under the direction of Dr. John Myers from the Missouri University of Science and Technology located in Rolla, MO. Twelve coating systems including MoDOT system G were evaluated through several laboratory tests to study and predict the field performance and durability of new coating technologies. The new coating systems investigated in this study involved polyurea, polyaspartic polyurea, polysiloxane polymers and fluoropolymer. To date, these coating system technologies have not been used as a steel structural coatings system in the State of Missouri by MoDOT. The laboratory tests consist of freeze-thaw stability, salt fog resistance, QUV weathering and electrochemical tests. The comparison study was carried out to benchmark and understand the pros and cons of these new coating systems. In addition, two coating systems served as overcoating studies for lead-based paint systems representative of older existing bridges in the state of Missouri. These overcoating systems were evaluated using an accelerated lab test method and electrochemical test. The performance of the existing MoDOT calcium sulfonate (CSA) overcoating system (system S) was also studied within the test matrix for comparative purposes. The test results show that moisture cured urethane micaceous iron oxide zinc/polyurea polyaspartic is a promising coating system for recoating of new steel bridges and that aliphatic polyaspartic polyurea can also be applied on existing coatings after the surface is properly prepared"--Technical report documentation page.

Download or read book Public Roads written by and published by . This book was released on 1996 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coating Performance on Existing Steel Bridge Superstructures written by R. Liu and published by . This book was released on 2020 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Steel Coatings for Corrosion Mitigation written by John Joseph Myers and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Task 1 of this project was to survey the performance of coating systems for steel bridges in Missouri and to evaluate coating and recoating practices. Task 1 was led under the direction of Dr. Glenn Washer from the University of Missouri located in Columbia, MO. A specific literature review focused on current state-of-the-practice for overcoatings, bridge coating assessment and rating, deterioration rate modeling as well as the risk assessment for overcoating. A new coating evaluation guideline was created to meet the needs of bridge maintenance in Missouri. Finally a field survey was carried out onto the existing bridge coatings across 10 Missouri Department of Transportation (MoDOT) districts and 26 counties. It was found that system S and G perform very well in many of the situations observed. The survey indicated that in many cases system S overcoatings are providing service life extension for the coating system, with some early failures resulting from severe exposure to deck drainage and corrosion. Deck condition, drainage, and joint conditions were found to be the dominate factor in deterioration of the coating system, regardless of the age of the coating. Task 2 of this project investigated the performance of new types of coating technologies on bridge corrosion mitigation and was led under the direction of Dr. John Myers from the Missouri University of Science and Technology located in Rolla, MO. Twelve coating systems including MoDOT system G were evaluated through several laboratory tests to study and predict the field performance and durability of new coating technologies. The new coating systems investigated in this study involved polyurea, polyaspartic polyurea, polysiloxane polymers and fluoropolymer. To date, these coating system technologies have not been used as a steel structural coatings system in the State of Missouri by MoDOT. The laboratory tests consist of freeze-thaw stability, salt fog resistance, QUV weathering and electrochemical tests. The comparison study was carried out to benchmark and understand the pros and cons of these new coating systems. In addition, two coating systems served as overcoating studies for lead-based paint systems representative of older existing bridges in the state of Missouri. These overcoating systems were evaluated using an accelerated lab test method and electrochemical test. The performance of the existing MoDOT calcium sulfonate (CSA) overcoating system (system S) was also studied within the test matrix for comparative purposes. The test results show that moisture cured urethane micaceous iron oxide zinc/polyurea polyaspartic is a promising coating system for recoating of new steel bridges and that aliphatic polyaspartic polyurea can also be applied on existing coatings after the surface is properly prepared"--Technical report documentation page.

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.

Download or read book Evaluation of volatile organic compound VOC compatible high solids coating systems for steel bridges written by and published by . This book was released on 1991 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of solvent-based and water-based coating systems formulated with low volatile-organic compound (VOC) were studied to determine the effect of solvent reduction and solids increase on their performance on steel bridges. All the systems contained VOC contents lower than 340 g/l. These systems included zinc rich systems, epoxy mastics, two CALTRANS systems, and silicone rubber systems. High-VOC solvent-based systems were used as controls. Two accelerated laboratory weathering regimens, a cyclic salt-fog/freeze exposure and an ultraviolet/condensation exposure, were utilized as evaluation tools. Adhesion strengths and gloss retention properties of the coating systems before and after the tests were also measured.

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.

Download or read book Federal Highway Administration 100 year coating study written by Turner-Fairbank Highway Research Center and published by . This book was released on 2012 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Exodermic Bridge Deck Performance Evaluation written by Irene K. Battaglia and published by . This book was released on 2010 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preliminary Assessment of Procedures for Coating Steel Components on Virginia Bridges written by Stephen R. Sharp and published by . This book was released on 2013 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to conduct a preliminary assessment of the Virginia Department of Transportation's (VDOT's) bridge coating practices to identify areas where process improvements and or cost savings could be realized. The assessment included reviewing VDOT's coating procedures, coating performance, and costs associated with bridge coating work, including containment systems, surface preparation techniques, and coating systems. In addition, information on bridge coating products and programs from bridge coating industries and organizations was gathered. The study found that the predominant methods VDOT uses to prepare and coat steel bridge components are adequate and are consistent with industry and compliance standards. These methods include dry abrasive blasting and the use of power tool cleaning for surface preparation conventional full containment that achieves minimal emissions; and use of a three-coat zinc-based coating system. However, enacting changes in some of the preliminary work for a bridge coating project could improve VDOT's coating process and potentially reduce costs. These changes include providing additional guidance for coating treatment decisions and preventive maintenance; providing contractors more project scope details in the bid and contract documents; and requiring discussion of job specific tasks in the preconstruction meeting. Combining the data from Site Manager and the Pontis Structure Inventory appears to be an efficient means of evaluating expenditures and trends. Analyzing costs for recoating work VDOT's most common coating method can be expedited by using "bridge deck area" (a field in the Pontis Structure Inventory) rather than "steel tonnage" which must be drawn from individual contracts.

Download or read book Preliminary Assessment of Procedures for Coating Steel Components on Virginia Bridges written by Stephen R. Sharp and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to conduct a preliminary assessment of the Virginia Department of Transportation's (VDOT's) bridge coating practices to identify areas where process improvements and or cost savings could be realized. The assessment included reviewing VDOT's coating procedures, coating performance, and costs associated with bridge coating work, including containment systems, surface preparation techniques, and coating systems. In addition, information on bridge coating products and programs from bridge coating industries and organizations was gathered. The study found that the predominant methods VDOT uses to prepare and coat steel bridge components are adequate and are consistent with industry and compliance standards. These methods include dry abrasive blasting and the use of power tool cleaning for surface preparation conventional full containment that achieves minimal emissions; and use of a three-coat zinc-based coating system. However, enacting changes in some of the preliminary work for a bridge coating project could improve VDOT's coating process and potentially reduce costs. These changes include providing additional guidance for coating treatment decisions and preventive maintenance; providing contractors more project scope details in the bid and contract documents; and requiring discussion of job specific tasks in the preconstruction meeting. Combining the data from Site Manager and the Pontis Structure Inventory appears to be an efficient means of evaluating expenditures and trends. Analyzing costs for recoating work VDOT's most common coating method can be expedited by using "bridge deck area" (a field in the Pontis Structure Inventory) rather than "steel tonnage" which must be drawn from individual contracts.

Download or read book Coating and Corrosion Costs of Highway Structural Steel Report written by S. Frondistou-Yannas and published by . This book was released on 1980 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data have been collected and analyzed on the rates of deterioration and the repainting costs for structures with various coatings in four exposure environments. A simulation computer model has been built to analyze and predict corrosion and maintenance costs. This model can be used to derive the optimal painting schedule for a specific coating, the optimal protection method for a specific bridge, or a detailed analysis of costs for a single painting job or an entire maintenance program. Preprogrammed or user-furnished data may be utilized.