Geopolymer foams: An overview of recent advancements
authors Novais, RM; Pullar, RC; Labrincha, JA
nationality International
journal PROGRESS IN MATERIALS SCIENCE
author keywords Geopolymer foam; Thermal insulation; Adsorption; pH buffering; Catalyst
keywords ASH-BASED GEOPOLYMER; METAKAOLIN-BASED GEOPOLYMER; ALKALI-ACTIVATED MATERIALS; POROUS FLY-ASH; ALUMINOSILICATE INORGANIC POLYMER; MOISTURE BUFFERING CAPACITY; HEAVY-METALS ADSORPTION; PORE-SIZE DISTRIBUTION; THERMAL-CONDUCTIVITY; SILICA-FUME
abstract Geopolymer foams (highly porous materials) have emerged as one of the most exciting materials over the past few years due to their remarkable properties, low cost and green synthesis protocol, enabling their use in various high added-value applications. Review papers on porous geopolymers are uncommon, and the emphasis has been given to materials processing and properties, while the applications were only briefly addressed. This review aims to fill this gap by presenting a comprehensive literature survey and critical analysis of the most recent and exciting research carried out on geopolymer foams. Up to now, these bulk-type (not powders) materials have been mainly considered as thermal and acoustic insulators. However, besides addressing their use as building material, this review also shows that their use in less investigated, but environmentally and economically relevant applications (e.g. bulk-type adsorbents, pH buffering agents and catalysts), is feasible and might ensure performance and technical advantages over their powdered counterparts. The limitations, challenges and future prospects associated with the different applications are presented. This review shows the remarkable potential of geopolymer foams in high added-value applications, far beyond their historical use as Portland cement replacement, which may encourage the widespread technological use of these materials.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0079-6425
year published 2020
volume 109
digital object identifier (doi) 10.1016/j.pmatsci.2019.100621
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000508652300002
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  impact metrics
journal analysis (jcr 2019):
journal impact factor 31.56
5 year journal impact factor 37.352
category normalized journal impact factor percentile 98.885
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