Methods for Evaluating Fly Ash for Use in Highway Concrete (2013) / Chapter Skim
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Pages 49-51
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49 Conclusions Results of the literature review and a survey of SHAs suggested the need for improvements in tests and specifications for CFA used in highway concrete to better identify those properties affecting the concrete performance. Areas needing improvement include better characterization of (1)
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50 slurry and requires use of a mechanical agitator to minimize operator-induced variability. Overall, the foam index test is suitable for assessing CFA and AEA interactions, but it is not necessarily suitable for assessing the influence of CFA on air entrainment.
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From page 51... ...
51 analysis showed that KHI values are not significantly different from those obtained by the SAI test, but the test better defines the effect of a CFA on strength contribution at different ages and replacement levels. Also, specimens prepared using inert fillers did not pass the KHI test using existing SAI limits.
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