Alkali-Silica Reaction: Cause, Effects, Mitigation, and Repair

Alkali-Silica Reaction: Cause, Effects, Mitigation, and Repair course available for download now. you can contact with us for check Files-Screenshot, Demo or a module test. This courses is digital version, delivery via your email in 1~30 minutes. You can download to personal computer or online access with your smartphone, ipad or tablet.

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Alkali-Silica Reaction: Cause, Effects, Mitigation, and Repair

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ASR may cause considerable damage to concrete infrastructure such as bridges, highways, airport runways, and nuclear power plants. When reactive aggregates are included in a mix, moisture causes a reaction between the alkaline cement paste and the reactive amorphous silica. As a result, the gel continues to dilate, perhaps causing fissures in the concrete mass.

The Canadian Nuclear Safety Commission (CNSC) sponsored a study initiative at the University of Toronto to explore the effects of ASR on large-scale and small-scale concrete specimens. Several specimens were built with reactive (ASR) and non-reactive (normal) concrete and their short- and long-term structural and mechanical characteristics were evaluated. To hasten the disintegration of concrete, wall specimens were housed in an environmental room designed to hold big specimens in regulated high-temperature and high-humidity conditions.

In this presentation, we will review the study program’s findings, suggest best practices for reducing the danger of ASR in concrete during placement, and recommend many solutions for repairing structures that have been damaged by ASR.

Understanding the cause of ASR is one of the learning objectives.
Learn about the impact of ASR on the characteristics and durability of concrete.
Learn the best techniques for reducing the risk of ASR.
Learn about options for repairing structures damaged by ASR.

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