Journal article

Pore characteristics in one-part mix geopolymers foamed by H2O2: The impact of mix design

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



In geopolymers foamed by H2O2, it is important to consider the impact of mix design on both geopolymerisation reaction and the H2O2 foaming reaction to control the porosity of the geopolymer foam matrix. In this paper, the effect of mix design on both reactions is discussed and correlated with the properties of the resulting geopolymer foams. It is found that when the mix design provides a chemically stable environment for the foaming reaction and simultaneously facilitates rapid setting of the binders, it results in homogeneously distributed fine pores within the matrix. The homogeneity of pore distribution is determined by a non-destructive test and correlated with the thermal conductivity..

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Awarded by Australian Research Council (ARC) Linkage Grant

Awarded by ARC Centre for Advanced Manufacturing of Prefabricated Housing

Funding Acknowledgements

This work was funded in part by Australian Research Council (ARC) Linkage Grant [Grant ID: LP140100504], in part by the Centre for Sustainable Resource Processing through the Geopolymer Alliance, in part by the Particulate Fluids Processing Centre, and through the ARC Centre for Advanced Manufacturing of Prefabricated Housing [Grant ID: IC150100023]. 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. The guidance and advice received from Prof John L. Provis of the University of Sheffield during the course of this research is greatly appreciated. This work was performed in part at the Materials Characterization and Fabrication Platform (MCFP) at the University of Melbourne and the Victorian Node of the Australian National Fabrication Facility (ANFF).