Practices to Mitigate Alkali-Silica Reaction (ASR) Affected Pavements at Airports (2019) / Chapter Skim
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Pages 52-54
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52 ASR is an expansive distress occurring in concrete as a result of a chemical reaction between certain siliceous minerals in susceptible aggregates and alkalis in the hydrated cement paste. The presence of ASR on concrete pavements can have a devastating effect on pavement performance, not only in terms of reduced functionality, but also in terms of shortened service lives.
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Conclusions and Further Research 53 maintain the serviceability of the pavement. In this vein, these techniques can be effective short-term solutions until additional funding can be secured and more substantial rehabilitation can be programmed.
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54 Practices to Mitigate Alkali-Silica Reaction (ASR) Affected Pavements at Airports • Use lithium-based admixtures in the concrete mixture, the effectiveness of which is highly dependent on the type of aggregate, the alkali content in the concrete, and the form of lithium.
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