2005•Journal of Structural and Construction Engineering (Transactions of AIJ)Open access

STRENGTH EFFICIENCY OF FLY ASH IN HIGH-STRENGTH CONCRETE

Fu Rong Wu, Yoshihiro Masuda, Shigeharu Nakamura

Abstract

The influences of fly ash property, mixture proportion and different curing method on strength efficiency of fly ash in high-strength concrete are investigated in this study. The strength efficiency of fly ash, k, is pigeonholed as Portland cement-fly ash mass ratio. Under standard-curing, k increases with time, and bigger specific surface area of fly ash produced-by the same plant, higher the long-term strength efficiency, k under sealed-curing or atmospheric-exposure is lower than underwater-curing. Under atmospheric-exposure from the age of 7 days, k is around 0.8 against under standard-curing at the age of 91 days, 0.5 at the age of 365 days.

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Key concepts: Fly ash, Curing (chemistry), Portland cement, Materials science, Compressive strength, Cement, Composite material, Environmental science