Porous Geopolymer Insulating Core from a Metakaolin/Biomass Ash Composite
Abstract
:1. Introduction
2. Materials and Methods
2.1. Raw Materials
2.2. Sample Preparation
2.3. Characterization
3. Results and Discussion
3.1. Mineralogical Characterization
3.2. Macro and Microstructural Characterization
3.3. Density, Pore Size Distribution and Compressive Strength
3.4. Thermal Properties
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Element | O | Ca | P | K | Cl | Si | Mg | Na | Fe | S | Al |
---|---|---|---|---|---|---|---|---|---|---|---|
[wt. %] | 51.3 | 22.3 | 5.2 | 6.8 | 3.1 | 2.8 | 2.1 | 2.0 | 2.0 | 1.8 | 0.7 |
Mixture | MK [wt. %] | BM [wt. %] | KS23 [wt. %] | H2O2 [wt. % on the Whole Mixture] |
---|---|---|---|---|
MKBM50 | 25.0 | 25.0 | 50.0 | 5 |
MKBM75 | 12.5 | 37.5 | 50.0 | 5 |
Average Elemental Ratios [At. %] | MKBM50 | MKBM75 | (Ca, K)ASH Garcia-Lodeiro et al. [28] |
---|---|---|---|
Ca/Si | 0.1 | 0.2 | 0 < Ca/Si < 0.3 |
Si/Al | 2.1 | 2.8 | 1.2 < Si/Al < 10 |
K/Al | 0.5 | 3.5 | 0 < K/Al < 1.9 |
Sample | ρb [kg/m3] | ρt [kg/m3] | Po [vol. %] | Pc-u [vol. %] | Pt [vol. %] | Median Pore Diameter (0.01–1000 µm) [µm] |
---|---|---|---|---|---|---|
MKBM50 | 313 ± 3 | 2288 ± 1 | 54.4 | 32.1 | 86.5 | 0.07 |
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Natali Murri, A.; Medri, V.; Papa, E.; Laghi, L.; Mingazzini, C.; Landi, E. Porous Geopolymer Insulating Core from a Metakaolin/Biomass Ash Composite. Environments 2017, 4, 86. https://doi.org/10.3390/environments4040086
Natali Murri A, Medri V, Papa E, Laghi L, Mingazzini C, Landi E. Porous Geopolymer Insulating Core from a Metakaolin/Biomass Ash Composite. Environments. 2017; 4(4):86. https://doi.org/10.3390/environments4040086
Chicago/Turabian StyleNatali Murri, Annalisa, Valentina Medri, Elettra Papa, Luca Laghi, Claudio Mingazzini, and Elena Landi. 2017. "Porous Geopolymer Insulating Core from a Metakaolin/Biomass Ash Composite" Environments 4, no. 4: 86. https://doi.org/10.3390/environments4040086