The Influence of Diatomite Addition on the Properties of Geopolymers Based on Fly Ash and Metakaolin

The Influence of Diatomite Addition on the Properties of Geopolymers Based on Fly Ash and Metakaolin

Geopolymer materials, considered to be an alternative to Portland cement-based concretes, can be produced from various types of waste aluminosilicate raw materials. This article presents the results of research related to the use of diatomite as an additive in geopolymers. The results of testing geo...

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Bibliographic Details
Published in:Materials Vol. 17; no. 10; p. 2399
Main Authors: Nykiel, Marek, Korniejenko, Kinga, Setlak, Kinga, Melnychuk, Mykola, Polivoda, Nina, Kozub, Barbara, Hebdowska-Krupa, Maria, Łach, Michał
Format: Journal Article
Language:English
Published: Switzerland MDPI AG 16-05-2024
Subjects:
Aluminosilicates
Aluminum silicates
Analysis
Caustic soda
Cement
Compressive strength
Concrete
Construction industry
Contact angle
Diatomaceous earth
Energy consumption
Fly ash
Geopolymers
Grain size
Heat treatment
Influence
Investigations
Mechanical properties
Metakaolin
Physical properties
Portland cements
Raw materials
Sand
Silica
Substitutes
Temperature
Thermal analysis
Poland
geopolymer
fly ash
metakaolin
diatomite additive
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Summary:Geopolymer materials, considered to be an alternative to Portland cement-based concretes, can be produced from various types of waste aluminosilicate raw materials. This article presents the results of research related to the use of diatomite as an additive in geopolymers. The results of testing geopolymer composites with 1%, 3%, and 5% additions of diatomite with a grain size of 0-0.063 mm after and without thermal treatment were presented. This article presents the physical properties of the diatomite additive, the morphology of diatomite particles SEMs, thermal analysis, and compressive strength test results. In this research, diatomite was treated as a substitute for both fly ash and metakaolin (replaced in amounts of 1 and 3%) and as a substitute for sand introduced as a filler (in this case, 5% of diatomite was added). As a result of this research, it was found that the addition of diatomite instead of the main geopolymerization precursors in amounts of 1 and 3% had a negative impact on the strength properties of geopolymers, as the compressive strength was reduced by up to 28%. The introduction of crushed diatomite instead of sand in an amount of 5% contributed to an increase in strength of up to 24%.
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ISSN:1996-1944
1996-1944
DOI:10.3390/ma17102399