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TitleMix design, properties and cost analysis of fly ash-based geopolymer foam
Author(s)Abdollahnejad, Zahra
Pacheco-Torgal, F.
Félix, T.
Tahri, W.
Aguiar, J. L. Barroso de
KeywordsEnergy efficiency
Thermal insulators
Foam geopolymers
Mix design
Cost analysis
Issue date29-Jan-2015
JournalConstruction and Building Materials
CitationAbdollahnejad Z., Torgal F. P., Felix T., Tahri W., Aguiar A. Mix design, properties and cost analysis of fly ash-based geopolymer foam, Construction and Building Materials, Vol. 80, pp. 18-30, doi:10.1016/j.conbuildmat.2015.01.063, 2015
Abstract(s)This study has investigated the joint effect of several mix parameters on the properties of foam geopolymers. The mix parameters analysed through a laboratory experiment of 54 different mortar mixes were, sodium silicate/sodium hydroxide mass ratio (2.5, 3.5, 4.5), activator/binder mass ratio (0.6, 0.8, 1.0), chemical foaming agent type (hydrogen peroxide (H2O2) and sodium perborate (NaBO3)) and foaming agent mass ratio content (1%, 2%, 3%). Properties, SEM and FTIR analysis and cost analysis are included. The results show that the sodium perborate over performs hydrogen peroxide leading to a lower overall thermal conductibility of foam geopolymers. Mixtures with a low thermal conductivity of around 0.1 W/ (m K) and a compressive strength of around 6 MPa were achieved. The cost analysis show that the foaming agents are responsible for a small percentage of foam geopolymers total cost being that the alkaline activators are responsible for more than 80%.
AccessOpen access
Appears in Collections:C-TAC - Artigos em Revistas Internacionais

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