Abstract
In this present investigation, the fly ash powder (raw material) was collected from the NTPC, Assam. For particle size reduction, milling operation was carried out on raw fly ash powder by laboratory pot mill. Fly ash (FA) and milled fly ash (MFA) powder were characterized by optical microscopy (OM), field emission scanning electron microscopy (FESEM) and Fourier transmission infrared spectroscopy (FTIR) technique as well. Geopolymer specimens were prepared by RFA and MFA powder by mixing with alkaline solution (14 M NaOH solution along with Na2SiO3 solution) followed by artificial curing at 60 °C for 24 h. Compressive test of geopolymer samples were carried out and the fracture surfaces of the tested specimens were characterized by FESEM.
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