A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
On the hydration of synthetic aluminosilicate glass as a sole cement precursor
Abstract This paper reports on the synthesis and characteristics of a novel aluminosilicate glass-based cementitious binder. We investigated the hydration kinetics, degree of reaction, and phase assemblage of the glass via XRD, DTG, 27Al and 29Si MAS NMR, FTIR, SEM/EDS and thermodynamic modelling. The glass exhibits hydraulic properties in which the binder developed impressive compressive strength at early age. The main hydration products are an intermixed of Na and/or Al incorporated in C–S–H gel. Hydrotalcite precipitated with slower rate and thus may generate crystallization pressure on the binder at late stage. The glass reached a high degree of hydration (ca. 73 % based on quantitative 29Si NMR analysis) without using any activators or co-binding systems. Therefore, the developed glass reported herein has high potential as a new low-carbon cementitious binder since it can be synthesised from naturally occurring carbonate free silicate minerals.
Graphical abstract Display Omitted
Highlights Novel synthetic glass-based cement was developed. The glass is hydraulically reactive without the use of activators or co-binders. The glass could be synthesised with low-raw materials related CO2 emissions. The developed glass has potential as cementitious binder with low carbon footprint.
On the hydration of synthetic aluminosilicate glass as a sole cement precursor
Abstract This paper reports on the synthesis and characteristics of a novel aluminosilicate glass-based cementitious binder. We investigated the hydration kinetics, degree of reaction, and phase assemblage of the glass via XRD, DTG, 27Al and 29Si MAS NMR, FTIR, SEM/EDS and thermodynamic modelling. The glass exhibits hydraulic properties in which the binder developed impressive compressive strength at early age. The main hydration products are an intermixed of Na and/or Al incorporated in C–S–H gel. Hydrotalcite precipitated with slower rate and thus may generate crystallization pressure on the binder at late stage. The glass reached a high degree of hydration (ca. 73 % based on quantitative 29Si NMR analysis) without using any activators or co-binding systems. Therefore, the developed glass reported herein has high potential as a new low-carbon cementitious binder since it can be synthesised from naturally occurring carbonate free silicate minerals.
Graphical abstract Display Omitted
Highlights Novel synthetic glass-based cement was developed. The glass is hydraulically reactive without the use of activators or co-binders. The glass could be synthesised with low-raw materials related CO2 emissions. The developed glass has potential as cementitious binder with low carbon footprint.
On the hydration of synthetic aluminosilicate glass as a sole cement precursor
Alzeer, Mohammad I.M. (author) / Nguyen, Hoang (author) / Fabritius, Tapio (author) / Sreenivasan, Harisankar (author) / Telkki, Ville-Veikko (author) / Kantola, Anu M. (author) / Cheeseman, Christopher (author) / Illikainen, Mirja (author) / Kinnunen, Paivo (author)
2022-05-29
Article (Journal)
Electronic Resource
English
Effect of waste aluminosilicate material on cement hydration and properties of cement mortars
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Effect of waste aluminosilicate material on cement hydration and properties of cement mortars
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