Geopolymer foam based on coal fly ash and metakaolin as an economic and environment friendly porous construction material

Geopolymer foam based on fly ash and metakaolin was designed and tested. The usual technique of activating aluminosilicate materials in a highly alkaline medium was applied, the generation of the geopolymer being favoured by developing the geopolymerization reaction. The traditional foaming agent (h...

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Published inRevista Romana de Inginerie Civila Vol. 14; no. 4; pp. 1 - 13
Main Authors Paunescu, Lucian, Paunescu, Bogdan-Valentin, Volceanov, Enikő
Format Journal Article
LanguageEnglish
Published Bucharest Matrix Rom 01.01.2023
Subjects
Aluminosilicates
Aluminum silicates
Bentonite
Compressive strength
Construction materials
Curing
Emissions
Energy consumption
Fly ash
Foaming agents
Geopolymers
Heat conductivity
Hydrogen peroxide
Manufacturing
Metakaolin
Nanomaterials
Porous materials
Raw materials
Sodium
Sodium perborate
Surfactants
Thermal conductivity
Vegetable oils
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Summary:Geopolymer foam based on fly ash and metakaolin was designed and tested. The usual technique of activating aluminosilicate materials in a highly alkaline medium was applied, the generation of the geopolymer being favoured by developing the geopolymerization reaction. The traditional foaming agent (hydrogen peroxide) has been replaced by sodium perborate, which is more stable and easier to handle. The work originality was the use of a nanomaterial (bentonite clay), having the ability to increase the mechanical strength. Density and thermal conductivity of the new product had low values (470 kg·m3 and 0.104 W·m-1-K-1) and compressive strength reached 7.5 MPa.
ISSN:2068-3987
2559-7485
DOI:10.37789/rjce.2023.14.4.3