The production process of foamed geopolymers with the use of various foaming agents / Patrycja Bazan, Michał Łach, Barbara Kozub, Beata Figiela, Kinga Korniejenko // W: Materials Design and Applications ... więcej

The production process of foamed geopolymers with the use of various foaming agents / Patrycja Bazan, Michał Łach, Barbara Kozub, Beata Figiela, Kinga Korniejenko // W: Materials Design and Applications IV [Dokument elektroniczny] / ed. Lucas F. M. da Silva. – Cham : Springer, 2023. – (Advanced Structured Materials, ISSN 1869-8433 ; 168). – S. 63-74 : il. (w tym kolor.). – Tryb dostępu: https://link.springer.com/chapter/10.1007/978-3-031-18130-6_5. – Bibliogr. s. 73-74, Abstr. – doi: 10.1007/978-3-031-18130-6_5. – ISBN 978-3-031-18130-6 (online). – ISBN 978-3-031-18129-0 (print)

The paper presents the possibility of producing foamed geopolymer materials with various foaming agents. Geopolymer is an amorphous aluminosilicate polymer made from the synthesis of silicon (Si) and aluminum ... więcej

The paper presents the possibility of producing foamed geopolymer materials with various foaming agents. Geopolymer is an amorphous aluminosilicate polymer made from the synthesis of silicon (Si) and aluminum (Al), geologically obtained from minerals. Geopolymers contain long chains (copolymers) of aluminum–silicon and aluminum, stabilizing metal cations, most often sodium, potassium, lithium or calcium, and bound water, in addition, there are usually various mixed phases: silicon oxide, unreacted aluminosilicate substrate, and—sometimes—crystallized aluminosilicates of the type zeolite. Most methods of geopolymer synthesis come down to one process: The fine and dried pozzolanic materials are mixed with an aqueous solution of a suitable silicate with the addition of a strong base—usually concentrated sodium or potassium hydroxide. The resulting paste behaves like cement. Fly ash from the Heat and Power Plant in Skawina (Poland) was used as a precursor for the production of geopolymer. The activation process was performed with a 10-molar solution of sodium hydroxide NaOH in combination with a solution of sodium silicate. The foaming agents were perhydrol, aluminum powder, and the Sika® Lightcrete-400 foaming saucer—an organic surfactant for the production of low-emission, lightweight, porous concrete. The produced foamed geopolymer materials were subjected to strength and thermal conductivity tests. The properties of the foams are related to the used foaming agent, but it is not the only factor affecting the quality of the materials. In the production of samples, the crucial factors are mixing the materials, the amount of the added additive, and the temperature of the geopolymerization process.