Practices to Mitigate Alkali-Silica Reaction (ASR) Affected Pavements at Airports (2019) / Chapter Skim
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34 Introduction As a means of determining the experiences in addressing ASR on concrete airfield pavement facilities, a web-based survey was prepared and distributed to selected airport owners/agencies. Some airports known to have ASR issues were earmarked, identified based on input from the technical panel, from contacts within the industry, and from the literature review.
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Airport Surveys 35 • Section 4 -- Mitigation Strategies to Address ASR. This section investigated the use of mitigation strategies (e.g., waterproofing surface treatments, lithium compounds)
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36 Practices to Mitigate Alkali-Silica Reaction (ASR) Affected Pavements at Airports Figure 10.
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Airport Surveys 37 structures)
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38 Practices to Mitigate Alkali-Silica Reaction (ASR) Affected Pavements at Airports The life expectation for each treatment, as provided by the survey respondents, is presented in Figure 17.
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Airport Surveys 39 Another respondent indicated that recycling of ASR-affected pavements is a sound engineering choice. The airport has successfully recycled ASR-affected concrete pavement for use as a base course in new pavement construction, in accordance with FAA Item P-219.
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40 Practices to Mitigate Alkali-Silica Reaction (ASR) Affected Pavements at Airports Other Comments Survey respondents had the opportunity to weigh on changes that have been made to their mix design specifications to help address ASR in new concrete construction.
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