Quantitative study of the reactivity of fly ash in geopolymerization by FTIR

Zhang, Zuhua and Wang, Hao and Provis, John L. (2012) Quantitative study of the reactivity of fly ash in geopolymerization by FTIR. Journal of Sustainable Cement-Based Materials, 1 (4). pp. 154-166. ISSN 2165-0373


Fourier transform infrared (FTIR) spectroscopy has been applied to analyse the environments of Al–O and Si–O bonds in fly ash, which are used as raw materials of geopolymer synthesis. It is noted that the relative intensities of the bands at around 1000, 910 and 700 cm-1 are much higher in fly ash with higher reactivity, as reflected by the compressive strength of geopolymer. Deconvolution analysis of the band from 400 to 1400 cm-1 shows that the cumulative area of these three resolved bands, together with the band at 1090 cm-1, which is assigned to the asymmetric stretching of Si(Al)–O–Si, is proportional to the reactivity of fly ash. If it is assumed that the area of the resolved bands is proportional to the concentration of the corresponding bonds, a general indication is therefore that fly ash containing more reactive bonds will exhibit higher reactivity in geopolymerisation. FTIR spectroscopy in combination with particle size analysis provides a fast approach to predict the reactivity of fly ash,from the perspective of aluminosilicate glass chemistry.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Copyright 2012 Taylor & Francis. Permanent restricted access to published version due to publisher copyright policy. Based on paper presented at: 8th Asian-Australasian Conference on Composite Materials (ACCM 8)
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 17 Feb 2013 04:58
Last Modified: 11 Nov 2014 01:38
Uncontrolled Keywords: geopolymer; fly ash; FTIR; reactivity; glass chemistry
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091206 Glass
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
01 Mathematical Sciences > 0101 Pure Mathematics > 010106 Lie Groups, Harmonic and Fourier Analysis
Socio-Economic Objective: B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870399 Construction Materials Performance and Processes not elsewhere classified
Identification Number or DOI: 10.1080/21650373.2012.752620
URI: http://eprints.usq.edu.au/id/eprint/22529

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