A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
An evaluation of representatives of the most popular types of concrete bridge deck sealers was conducted using a two-pronged approach: performance testing via accelerated weathering coupled with water immersion, and indirect testing using instrumental and analytical techniques. The goals of the project were to assess the ability of the sealers to protect embedded reinforcing steel from corrosion and to develop an effective test procedure for screening commercial products for use by the Department on new construction. The following classes of sealers were evaluated: silanes and siloxanes, water-based epoxy, polyester, aluminum stearate, silicate, and linseed oil. The silane and siloxane group performed best in all phases of testing. Linseed oil performed nearly as well; however, some questions were raised concerning its long term durability due to its limited depth of penetration and to the reactivity of the oil in the alkaline environment of fresh concrete. Based on these results, it is recommended that TEXAS STANDARD SPECIFICATION Item 428 be supplemented to permit the use of silane and siloxane-based sealers on new construction. The most effective screening procedure was shown to be a combination of accelerated weathering and indirect test methods including Weather-Ometer weathering coupled with 28 days of saline immersion, infrared spectroscopy, percent residue determination and depth of penetration testing.
An evaluation of representatives of the most popular types of concrete bridge deck sealers was conducted using a two-pronged approach: performance testing via accelerated weathering coupled with water immersion, and indirect testing using instrumental and analytical techniques. The goals of the project were to assess the ability of the sealers to protect embedded reinforcing steel from corrosion and to develop an effective test procedure for screening commercial products for use by the Department on new construction. The following classes of sealers were evaluated: silanes and siloxanes, water-based epoxy, polyester, aluminum stearate, silicate, and linseed oil. The silane and siloxane group performed best in all phases of testing. Linseed oil performed nearly as well; however, some questions were raised concerning its long term durability due to its limited depth of penetration and to the reactivity of the oil in the alkaline environment of fresh concrete. Based on these results, it is recommended that TEXAS STANDARD SPECIFICATION Item 428 be supplemented to permit the use of silane and siloxane-based sealers on new construction. The most effective screening procedure was shown to be a combination of accelerated weathering and indirect test methods including Weather-Ometer weathering coupled with 28 days of saline immersion, infrared spectroscopy, percent residue determination and depth of penetration testing.
Evaluation of Sealers for Concrete Bridges
W. Curra (author)
1990
49 pages
Report
No indication
English
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