Preparation of Geopolymer Foams Using Autoclave Curing

Géber, Róbert and Szabó, Roland and Kocserha, István (2019) Preparation of Geopolymer Foams Using Autoclave Curing. Materials Science and Engineering, 44 (2). pp. 13-22. ISSN 2063-6792

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Abstract

Geopolymers are potential substitute materials of traditional building materials. Geopolymer foams are also perspective materials for different foamed construction materials, like auto-clave aerated concretes. In this research geopolymer foams (GPF) were prepared using fly ash, sodium-hydroxide alkaline activator and aluminum paste as foaming agent. Different curing conditions (curing in furnace and curing in autoclave) were applied on the samples. Density and compressive strength were determined, SEM and FTIR tests were done on GPFs, as well. The results show that compressive strength is highly affected by the pore forming mechanisms, which influencing the porosity of GPF, however the autoclave curing has less impact on the strength.

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