Design and characterization of geopolymer foams reinforced with Miscanthus x giganteus fibers
- This paper presents the effects of different amounts of fibers and foaming agent, as well as different fiber sizes, on the mechanical and thermal properties of fly ash-based geopolymer foams reinforced with Miscanthus x giganteus fibers. The mechanical properties of the geopolymer foams were measured through compressive strength, and their thermal properties were characterized by thermal conductivity and X-ray micro-computed tomography. Furthermore, design of experiment (DoE) were used to optimize the thermal conductivity and compressive strength of Miscanthus x giganteus reinforced geopolymer foams. In addition, the microstructure was studied using X-ray diffraction (XRD), Field emission scanning electron microscopy (SEM) and Fourier-Transform Infrared Spectroscopy (FTIR). Mixtures with a low thermal conductivity of 0.056 W (m K)−1 and a porosity of 79 vol% achieved a compressive strength of only 0.02 MPa. In comparison, mixtures with a thermal conductivity of 0.087 W (m K)−1 and a porosity of 58 vol% achieved a compressive strength of 0.45 MPa.
Document Type: | Preprint |
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Language: | English |
Author: | Katharina Walbrück, Steffen Witzleben, Dietmar Stephan |
DOI: | https://doi.org/10.21203/rs.3.rs-3905412/v1 |
Publisher: | Research Square |
Date of first publication: | 2024/02/07 |
Funding: | This work was supported by the European Regional Development Fund [Grand No. EFRE 0500035] and the German Federal Ministry of Education and Research [Grand No. 13FH158IN6]. |
Departments, institutes and facilities: | Fachbereich Angewandte Naturwissenschaften |
Projects: | FHInvest 2016: Feldemissions-Elektronenmikroskop mit Computertomographie-System für Materialentwicklungen und Sicherheitstechnologien (DE/BMBF/13FH158IN6) |
Biobasierte Produkte (EFRE/0500035) | |
Dewey Decimal Classification (DDC): | 6 Technik, Medizin, angewandte Wissenschaften / 66 Chemische Verfahrenstechnik / 660 Chemische Verfahrenstechnik |
Entry in this database: | 2024/02/23 |
Licence (German): | Creative Commons - CC BY - Namensnennung 4.0 International |