Evaluation of Surface Modification Methods to Mitigate Rusting and Pitting in Weathering Steel Bridges PDF Download
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Author: A. Raman
Publisher:
ISBN:
Category : Iron and steel bridges
Languages : en
Pages : 178
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Book Description
Author: A. Raman
Publisher:
ISBN:
Category : Iron and steel bridges
Languages : en
Pages : 178
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 704
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 776
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Book Description
Author:
Publisher: Transportation Research Board National Research
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 116
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Book Description
Author:
Publisher:
ISBN:
Category : Protective coatings
Languages : en
Pages : 616
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Book Description
Author:
Publisher:
ISBN:
Category : Iron and steel bridges
Languages : en
Pages : 123
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Book Description
This report describes a 4-year bridge and test fence evaluation of protective coatings for maintaining weathering steel bridges. The test specimens consisted of steel panels cut from existing aged weathering steel bridges, along with some new mill scale bearing weathering steel as a control. The condition of the specimens ranged from extensively pitted and corroded (from chloride exposure) to mildly corroded and non-pitted. Specimens were cut from angle irons, stiffeners, cover plates, and web areas of bridges. Three methods of surface preparation were used: dry abrasive blasting, wet abrasive blasting, and power tool cleaning using rotary peening and non-woven abrasive discs.
Author:
Publisher:
ISBN:
Category : Architecture
Languages : en
Pages : 344
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Book Description
Author: Clive H. Hare
Publisher: Van Nostrand Reinhold Company
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 328
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Book Description
Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.
Author: International Road Federation
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 748
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Book Description
Author: Douglas D. Crampton
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 40
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Book Description
Weathering steel is commonly used as a cost-effective alternative for bridge superstructures, as the costs and environmental impacts associated with the maintenance/replacement of paint coatings are theoretically eliminated. The performance of weathering steel depends on the proper formation of a surface patina, which consists of a dense layer of corrosion product used to protect the steel from further atmospheric corrosion. The development of the weathering steel patina may be hindered by environmental factors such as humid environments, wetting/drying cycles, sheltering, exposure to de-icing chlorides, and design details that permit water to pond on steel surfaces. Weathering steel bridges constructed over or adjacent to other roadways could be subjected to sufficient salt spray that would impede the development of an adequate patina. Addressing areas of corrosion on a weathering steel bridge superstructure where a protective patina has not formed is often costly and negates the anticipated cost savings for this type of steel superstructure. Early detection of weathering steel corrosion is important to extending the service life of the bridge structure; however, written inspection procedures are not available for inspectors to evaluate the performance or quality of the patina. This project focused on the evaluation of weathering steel bridge structures, including possible methods to assess the quality of the weathering steel patina and to properly maintain the quality of the patina. The objectives of this project are summarized as follows: -- Identify weathering steel bridge structures that would be most vulnerable to chloride contamination, based on location, exposure, environment, and other factors. -- Identify locations on an individual weathering steel bridge structure that would be most susceptible to chloride contamination, such as below joints, splash/spray zones, and areas of ponding water or debris. -- Identify possible testing methods and/or inspection techniques for inspectors to evaluate the quality of the weathering steel patina at locations discussed above. -- Identify possible methods to measure and evaluate the level of chloride contamination at the locations discussed above. -- Evaluate the effectiveness of water washing on removing chlorides from the weathering steel patina. -- Develop a general prioritization for the washing of bridge structures based on the structure's location, environment, inspection observations, patina evaluation findings, and chloride test results.
