A laboratory study was undertaken to investigate the effect of wet-dry (W-D) cycleson aggregate bases, namely, Meridian (M), Richard Spur (RS), and Sawyer (S),stabilized with cement kiln dust (CKD), class C fly ash (CFA), and fluidized bed ash(FBA). Cylindrical specimens were molded, cured, and subjected to W-D cyclesprior to testing for resilient modulus (Mr). It was found that the Mr values for most ofspecimens decreased as W-D cycles increased. Sawyer aggregates stabilized withCKD, however, exhibited an increase with W-D cycles up to 8, beyond which adecrease in Mr occurred. It is believed that such a decrease/increase in Mr values maybe attributed to the deceleration/acceleration of pozzolanic reactions. Laboratoryobservations revealed visual degradation of only Sawyer specimens stabilized withfluidized bed ash after 16 W-D cycles; no Mr tests were performed on the degradedspecimens.
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