FraMCoS 6 2007 Catania, Italy

Concrete damage due to alkali-silica reaction: A new method to determine the properties of the expansive gel

In this study the mechanism of Alkali-Silica Reaction (ASR) is investigated. A combined nu- merical and experimental research is presented. A meso mechanical model based on lattice theories is used as a starting point. Examples show that the model is…

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Year 2007
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Abstract

In this study the mechanism of Alkali-Silica Reaction (ASR) is investigated. A combined nu- merical and experimental research is presented. A meso mechanical model based on lattice theories is used as a starting point. Examples show that the model is able to simulate the damage mechanism in concrete due to ASR. One of the important input parameters in the model, but also one of the key players in the mechanism of ASR, is the amount of expansion of the gel and as a result the internal forces that are generated by this expan- sion. An experimental set-up is developed to measure the pressure generated during the reaction on a micro scale in order to assess the local pressure developed on each grain by its swelling.