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Alkali-silica reaction: damage to concrete structuralelements and concrete goods caused by aggrega


Materialprüfungs- und Versuchsanstalt Neuwied, 56564 Neuwied, Germany

 


Some of the aggregates used today contain alkali-reactive silicic acid. This can react with the alkali hydroxide dissolved in the concrete pore water to form an alkali-silicic acid gel. This reaction is called the 'alkali-silica reaction' (ASR) and can lead under certain circumstances to massive damage to the concrete. The introduction of the new Alkali Directive [5] by the building authorities and the new DIN 1045 2 [1] has resulted in far-reaching consequences throughout Germany, not only for the manufacturers of aggregates and concretes, but also for the planners of buildings constructed from concrete and steel reinforced concrete.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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