Steel bridge corrosion prevention alternatives offer the bridge designer a wide range of options such as weathering steel, zinc rich coatings, hot dip galvanizing, and metalizing. Comparing and selecting the right option depends on many factors, including the life cycle cost of each alternate. This workshop informs the steel bridge community of these options and how to compare and select the best fit for a specific project.
Modern Corrosion Protection Systems
Justin Ocel, Federal Highway Administration (FHWA)Show Abstract
This presentation will give a high-level viewpoint of corrosion protection systems currently used in the steel bridge sector, discussing the four main types of systems; uncoated weathering steel, liquid-applied coatings, thermal spray, and hot-dip galvanizing. The performance expectations and costs of the four systems will also be covered.
NCHRP 12-117 Guidelines for Corrosion Protection of Steel Bridges Using Duplex Coating Systems
James Ault, KTA-Tator/Elzly TechnologiesShow Abstract
This presentation will provide an update on NCHRP project 12-117. The project seeks to develop guidelines for bridge owners on the use of duplex coating systems for corrosion protection of steel bridges. Ultimately, the project objectives are to (1) develop AASHTO-adopted guidelines for using duplex coating systems to extend the service life of steel bridges and (2) plan and conduct a workshop to demonstrate the use of the proposed guidelines to an audience of DOT staff and other stakeholders. The guidelines will cover the selection and application of duplex coating systems during the new construction, maintenance, and rehabilitation of existing steel bridges.
Performance of Uncoated Weathering Steel Bridges in Connecticut
Michael Culmo, CHA Consulting, Inc.Show Abstract
The Connecticut Department of Transportation recently completed a study of the performance of 130+ uncoated weathering steel bridges in the state. Connecticut has been using uncoated weathering steel for over 50 years. Concerns have been raised recently regarding the durability of these bridges, which led to the study. The purpose of the investigation was to determine if the Department’s current policy would produce durable bridges. The study focused on several key factors including type of crossing, spray from vehicles underneath the bridge, proximity to water, and most importantly, detailing used for the bridge deck. The general conclusion is that the durability of the bridges is most effected by the detailing of the deck and expansion joints. Several of the oldest bridges in the study had excellent performance due to good detailing practices. The results of the study will be presented including recommendations for design and detailing of uncoated weathering steel bridges.
Field Metalizing of a Steel Beam Bridge in Vermont
James McCarthy, Vermont Agency of TransportationShow Abstract
The Vermont Agency of Transportation applied for and received funding under the Technology and Innovation Program (TIDP) for an Accelerated Innovation Deployment (AID) Demonstration project to field metalize a steel beam bridge. The purpose of the project was to provide information on the viability of field metalizing existing structural steel for bridges that are experiencing failing paint systems. Metalizing of bridge structural steel has been generally performed in the shop when the bridge is initially fabricated. Successful application of field metalizing on this project will provide for an additional method of protecting structural steel with an anticipated greater life span than current coatings resulting in a lower life cycle cost for protection of these structures.
Life Cycle Cost Analysis for Steel Bridge Coatings
Paul Vinik, Greenman-Pedersen, Inc. (GPI)Show Abstract
A tool to calculate most economical coating rehabilitation strategy specific to an individual bridge will be presented. The tool incorporates the costs of temporary traffic control and time value of money principles to compare options evenly at a future date. For example, utilizing this tool and applying location specific parameters, the user can compare the cost of complete removal and replacement with those of spot and zone coating.
DISCLAIMER: All information shared in the TRB Annual Meeting Online Program is subject to change without notice. Changes, if necessary, will be updated in the Online Program and this page is the final authority on schedule information.