Effect of different curing temperatures on alkali activated palm oil fuel ash paste. (30th September 2015)

• Record Type: Journal Article
• Authors: Salih, Moslih Amer; Farzadnia, Nima; Abang Ali, Abang Abdullah; Demirboga, Ramazan
• Is Part Of: Construction & building materials. Volume 94(2015)
• Page Start: 116
• Page End: 125
• Publication Date: 2015-09-30
• Subjects: Palm oil fuel ash -- Alkali activation -- Curing temperature -- Geopolymer binder; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2015.06.052
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: This study showed that oven curing accelerate the geopolymerization. The threshold temperature was 70 °C for the alkali activation of POFA. Ambient temperature can be applied for curing of alkali activated POFA. Abstract: This study investigated effects of curing temperature on alkali activation of palm oil fuel ash. Compression test was conducted on samples activated with a mixture of sodium silicate and sodium hydroxide at different curing temperatures; ambient, 60 °C, 70 °C, and 80 °C. Also, XRD, TGA, FTIR, and SEM/EDX tests were performed to trace changes due to geopolymerization. Results showed that the ambient temperature can be applied to activate mixes with 100% POFA. Compressive strength of up to 36.8 MPa was obtained when samples cured at ambient temperature. The threshold temperature for activation of POFA was 70 °C.