Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/152125
Title: Quantitative characterization of aluminosilicate gels in alkali-activated incineration bottom ash through sequential chemical extractions and deconvoluted nuclear magnetic resonance spectra
Authors: Zhu, Weiping
Chen, Xu
Struble, Leslie J.
Yang, En-Hua
Keywords: Engineering::Civil engineering
Issue Date: 2019
Source: Zhu, W., Chen, X., Struble, L. J. & Yang, E. (2019). Quantitative characterization of aluminosilicate gels in alkali-activated incineration bottom ash through sequential chemical extractions and deconvoluted nuclear magnetic resonance spectra. Cement and Concrete Composites, 99, 175-180. https://dx.doi.org/10.1016/j.cemconcomp.2019.03.014
Project: ETRP 1301 104
Journal: Cement and Concrete Composites
Abstract: It has been reported that incineration bottom ash (IBA) from municipal solid waste can be a potential precursor for the synthesis of alkali-activated materials. It has been reported that the resulting alkali-activated IBA (AA-IBA) binder consists of 20 wt% calcium-containing phases. It is expected that aluminosilicate phases may coexist in the complex AA-IBA binder. Differentiating aluminosilicate phases from C-(A)-S-H phases could be challenging, for in general the two phases largely overlap in the spectra. In this study, aluminosilicate gels in a complex AA-IBA are separated and quantitatively characterized based on sequential chemical extractions, thermogravimetric analysis and nuclear magnetic resonance spectral subtraction and deconvolution. It concludes that the resulting AA-IBA binder consists of 17 wt% aluminosilicate gel with a Si/Al ratio of 2.52 resembling an aged alkali-activated coal fly ash. As understanding gel compositions in a binder is important, the methodology developed in this study is of significance and would benefit the development of alternative binders incorporating solid wastes and industry by-products.
URI: https://hdl.handle.net/10356/152125
ISSN: 0958-9465
DOI: 10.1016/j.cemconcomp.2019.03.014
Rights: © 2019 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

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