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Bridge Construction with Unpainted,High Strength,Low-Alloy Steel:The Aesthetic Problems,

机译:未涂漆,高强度,低合金钢的桥梁施工:美学问题,

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Use of high-strength,low-alloy steel (ASTM A-242and A-588) in bridges,as a means of reducing maintenance costs,results in an aesthetic problem of rust staining of abutments and piers. Staining occurs as rust particles,carried by runoff,penetrate into the abutment and pier concrete. The objective of this part of the project is the elimination,easy removal,or camouflaging of staining. There are numerous solutions to the problem. The scope of the project covers the application of a coating to provide an impenetrable layer. Two such products were tested:Barrier and Thompson's Water Seal 101. Following initial testing,it was found only Barrier held some promise. Further research,in which Barrier was subjected to more severe rust staining,resulted in failure of the product to provide the impenetrable layer. The aesthetic problems are not insurmountable,but various alternatives appear to offer more success than the use of a penetrant-resistant coating.

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