... photomicrographs of fresh and modified fly ash. (A and B) SEM of fresh fly ash at1,000 and 2,500 timesmagnification, (C and D) SEM of ball milled fly ash for 20 h at1,000 and 3,000 timesmagnification, (E and ... SEM of ball milled fly ash for 40 h at1,000 and 3,000 timesmagnification, (G and H) SEM of ball milled fly ash for 60 h at1,000 and 3,000 timesmagnificationFig. 10 (A and B) TEM images of fly ... outtowards the effective utilization of fly ash and withunderstanding of potential environmental and health im-pacts associated with its disposal by land filling.In this paper an attempt has...