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- Title
Determination of the Thermal Parameters of Geopolymers Modified with Iron Powder.
- Authors
Prałat, Karol; Ciemnicka, Justyna; Koper, Artur; Szczypiński, Michał Marek; Łoś, Piotr; Nguyen, Van Vu; Le, Van Su; Rapiejko, Cezary; Ercoli, Roberto; Buczkowska, Katarzyna Ewa
- Abstract
The paper presents the results of research concerning the influence of a metallic micromaterial on the thermal conductivity λ, specific heat Cp, and thermal diffusivity a of modified geopolymers. Iron oxide in the form of powder with an average granulation of 10 μm was used as the geopolymer-modifying material. The research concerned geopolymer composite samples with metakaolin (activated with potassium silicate) and the addition of iron in amounts ranging from 0.5% to 2.5% in relation to the weight of the metakaolin. Additionally, the samples were modified with sand and fireclay in two different amounts—1:1 and 1:1.2 in relation to the metakaolin. The addition of fireclay caused a decrease in the thermal conductivity of the composites by 30% when compared to the samples with the addition of sand. The lowest value of the thermal conductivity coefficient λ was obtained for the geopolymer with metakaolin and fireclay. When the ratio of these components in the composite was 1:1, the value of thermal conductivity was equal to 0.6413 W/(m·K), while in the case of their ratio being 1:1.2, it was equal to 0.6456 W/(m·K). In the samples containing fireclay, no significant influence of the added iron on the values of thermal conductivity was noticed. In the case of the geopolymer with sand, the effect was noticeable, and it was most visible in the samples containing metakaolin and sand in the ratio of 1:1.2. It was noticed that with an increase in the addition of Fe, the thermal conductivity of the composite increased.
- Subjects
IRON powder; THERMAL conductivity; THERMAL diffusivity; SPECIFIC heat; POTASSIUM silicate; FERRIC oxide; IRON
- Publication
Polymers (20734360), 2022, Vol 14, Issue 10, p2009
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym14102009