Journal article

Alkali activated slag foams: The effect of the alkali reaction on foam characteristics

Ailar Hajimohammadi, Tuan Ngo, Priyan Mendis, Alireza Kashani, Jannie SJ van Deventer

Journal of Cleaner Production | ELSEVIER SCI LTD | Published : 2017


The effect of the alkali activation reaction on the characteristics of slag-based foams made by the mechanical foaming technique is investigated. The mechanical foaming method is selected in order to control the density and quantity of the pre-made foam and minimise the impact of alkali reaction on the amount of initial foaming. Despite the similarity of the pre-made foams mixed with the altered binder formulae, a change in the alkali reaction is shown to affect the pore size distribution, pore homogeneity, density and properties of the inorganic foams. The water content of the binders is shown to be the key factor affecting the bubble breakage and foam sorting during the mechanical mixing s..

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Awarded by ARC Linkage Grant

Funding Acknowledgements

This work was funded in part by the ARC Linkage Grant [LP140100504,2014], in part by the Centre for Sustainable Resource Processing through the Geopolymer Alliance, and in part by the Australian Research Council (including partial support through the Particulate Fluids Processing Centre). The authors would like to acknowledge Mr Christopher Ling Zhong Yi, Mr Christy Ribi Prasetyo, Mr Richard Alan Faulkner and Mr Stephen Gondokusumo for their assistance with some of the experimental work, and the guidance and advice received from Prof John L. Provis of the University of Sheffield during the early part of this research is greatly appreciated. This work is performed in part at the Materials Characterisation and Fabrication Platform (MCFP) at the University of Melbourne and the Victorian Node of the Australian National Fabrication Facility (ANFF).