Powder Additions to Mitigate Retardation in High Volume Fly Ash Mixtures

  title={Powder Additions to Mitigate Retardation in High Volume Fly Ash Mixtures},
  author={Dale P. Bentz},
While high volume fly ash (HVFA) concrete mixtures are attractive from a sustainability viewpoint, they are sometimes plagued by long delays in finishing, producing a performance that is unacceptable to contractors. In this paper, isothermal calorimetry studies are conducted to examine excessive retardation in HVFA mixtures based on both Class C and Class F fly ashes. In addition to quantifying the retardation, the calorimetric curves are also used to evaluate the performance of mitigation… CONTINUE READING
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