Geopolymerization of Fly Ashes from 6 Indonesian Power Plants Using A Standardized Recipes

R. E. Hidayati, G. R. Anindika, F. S. Faradila, C. I.B. Pamungkas, I. Hidayati, D. Prasetyoko, Hamzah Fansuri*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


Geopolymers were synthesized using fly ash as raw material from six steam power plants, Adipala (FA1), Indramayu (FA2), Paiton 9 (FA3), Asam-asam (FA4), Pulau Pisang (FA5), and Sanggau (FA6). Fly ash was tested for several characteristics using XRF, XRD, and SEM. XRF analysis showed FA1, FA4, and FA5 included in class C fly ash while FA2, FA3, and FA5 included in class F. The XRD analysis results showed that there were typical peaks of quartz, mullite, calcite, magnetite, and hematite in the fly ash samples. SEM analysis shows the morphology of the fly ash FA1, FA2, FA3, and FA4 spherical with different particle sizes, but in the fly ash FA5 and FA6, the morphological shape is irregular. The highest compressive strength test results obtained by geopolymers made from FA3 after 28 days with compressive strength values of 36.62 MPa. The intensity of the crystalline geopolymer phase decreases when compared to its fly ash. Geopolymer morphology shows the presence of unreacted fly ash particles.

Original languageEnglish
Article number012017
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 9 Jul 2020
Event2nd Joint Conference on Green Engineering Technology and Applied Computing 2020, IConGETech 2020 and International Conference on Applied Computing 2020, ICAC 2020 - Bangkok, Thailand
Duration: 4 Feb 20205 Feb 2020


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