Strength and microstructures of phosphate-based geopolymers from bituminous fly ash

Name: J. Srisaen

Organization : King Mongkut’s University of Technology Thonburi. School of Energy, Environment and Materials

Name: S. Asavapisit

Organization : King Mongkut’s University of Technology Thonburi. School of Energy, Environment and Materials

ThaSH: Fly ash

Abstract: This study investigated the characterizations of bituminous fly ash (BFA) from the power plant. BFA was used as aluminosilicate precursors for the synthesis of phosphate-based geopolymers. Four phosphoric acid solutions by the molar ratio of Al/P were an activator. Samples were prepared by adding activator to BFA to get a paste. The curing is done by both atmospheric (room) and accelerated means (60 ⁰C). Results showed that the optimum molar ratio of Al/P was 2.1 and gave a maximum strength of 25 kg/cm2 when curing at 60 ⁰C for 24 hours. Microstructural analysis found the formation of monetite. XRD also reveals the remaining crystalline phases of quartz and mullite. SEM images confirm the presence of monetite with a lamella-like morphology.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2020

Modified: 2020-05-26

Issued: 2020-05-26

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BibliograpyCitation : In King Mongkut's University of Technology North Bangkok Faculty of Technical Education. The 7th International Conference on Technical Education 2020 (ICTechED 7th) (p.276-279). Bangkok : King Mongkut's University of Technology North Bangkok

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