Thermal conductivity of reinforced geopolymer foams.
| Autor: | Le, Van Su |
|---|---|
| Další autoři: |
Hájková, Pavlína, 1970-
Louda, Petr, 1958-
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| Jazyk: | angličtina |
| Předmět: | |
| Druh dokumentu: | Non-fiction |
| ISSN: | 0862-5468 |
| Abstrakt: | Abstract: Reinforced geopolymer foams were studied in this work as potential building materials. It has been widely assumed that for a given thermal conductivity λ [W.m-¹.K-¹], geopolymer foams can have a lighter density than other materials. The study sought to test this assumption by comparing the thermal conductivity between geopolymer foams. The thermal conductivity λ was measured using an ISOMET 2014 device. In all the experiments, the geopolymer foams were obtained by adding aluminium powder and several combinations: silica fume and fine sand reinforced by short basalt fibres. Curing was carried out at room temperature and then in a furnace at 70°C. After the curing process, the properties of the samples were tested at 7 and 28 days. The results show that the thermal conductivity, porosity, compressive strength, flexural strength and density for all of the tests ranged in the following values: 0.13 - 0.359 W.m-¹.K-¹; 41.8 - 62.5 %; 1.94 - 9 MPa; 0.96 - 2.93 MPa; 546 - 1028 kg.m-³, respectively. It was proven that the filler in the geopolymer foams has a significant influence on the mechanical and physical properties of the tested samples. |
| Databáze: | Katalog Knihovny AV ČR |
| Externí odkaz: |
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