Based on the data presented in Table 1, SiO2 + Al2O3 + Fe2O3 (S + A + F) ratio of 0/212 lm sieve fraction was calculated as 83.99% and CaO ratio was determined as 5.34%. Based on this values, Seyitömer fly ash can be classified as F type of low-lime fly ash according to ASTM C 618 standard