The effect of water absorption and the role of fines on the yield stress of dense fly ash slurries

Fly ashes obtained from power stations burning Curragh and Tarong coal were aircyclosized into fractions of different particle sizes. The grading of f ractions were done according to the percentage of fines (-10 mu m at d(32) [sauter diameter]). The fraction with maximum fines was mixed with the orig inal fly ash samples in different proportions and water absorption determin ed. The yield stress of a slurry consisting of different proportions of fra ction with maximum fines and the original fly ash was measured. In this wor k the effect of water absorption and the role of fines on yield stress is p resented. (C) 1999 Elsevier Science Ltd. All rights reserved.