Comparison on efficiency factors of F and C types of fly ashes

► In this study, we compare Turkish C and F fly ash types. ► The efficiency factors “k” of fly ashes were obtained using Bloomy formula. ► Also some properties were found and compared. ► With the increase in concrete age “k” of F type replaced concretes increases more than those of C type. ► And it is seen that “k” increases with the increase in cement dosage and concrete age.