Evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicate
This study concerns the synthesis of geopolymeric foams from blast furnace slags, comparing the results of the produced materials using 8 M alkaline solutions of sodium metasilicate (Na2SiO3) or sodium hydroxide (NaOH) as geopolymerization agents with 1.4 and 1.6 g/L (solid/liquid) ratios of slags....
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| Format: | Article |
| Language: | English |
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Elsevier
2020-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785420316264 |
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| author | Flávio J.H. Tommasini Vieira Ramos Maria de Fátima Marques Vieira Lucas Galhardo Pimenta Tienne Vinícius de Oliveira Aguiar |
| author_facet | Flávio J.H. Tommasini Vieira Ramos Maria de Fátima Marques Vieira Lucas Galhardo Pimenta Tienne Vinícius de Oliveira Aguiar |
| author_sort | Flávio J.H. Tommasini Vieira Ramos |
| collection | DOAJ |
| description | This study concerns the synthesis of geopolymeric foams from blast furnace slags, comparing the results of the produced materials using 8 M alkaline solutions of sodium metasilicate (Na2SiO3) or sodium hydroxide (NaOH) as geopolymerization agents with 1.4 and 1.6 g/L (solid/liquid) ratios of slags. Blast furnace slags (BFS) were added to each alkali-activated solution reaction, maintaining under constant stirring during periods of 4, 20, and 24 h. Posteriorly, hydrogen peroxide 50% was inserted as a foaming agent. This method used room temperature (25 °C) to the production of the foams. The influence of the mixture parameters on the resultant porosity was observed through the characterization by X-ray fluorescence (XRF), Fourier transformed infrared (FTIR), X-ray diffraction (XRD), thermogravimetry (TG/DTG) and scanning electron microscopy (FEG-SEM) analyses. Geopolymeric foams (GF) were obtained with different characteristics of porosity, thermal stability, crystallinity, and interconnection between porous. Dimensional stability was observed on the samples of geopolymer of blast furnace slags with metasilicate. According to characteristics of the developed samples, they can be investigated as CO2 and other gases absorber, or retainer of harmful metals. |
| first_indexed | 2024-12-19T17:47:29Z |
| format | Article |
| id | doaj.art-e1718032d65340538527f47147dd60f5 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-19T17:47:29Z |
| publishDate | 2020-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-e1718032d65340538527f47147dd60f52022-12-21T20:12:02ZengElsevierJournal of Materials Research and Technology2238-78542020-09-01951201912029Evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicateFlávio J.H. Tommasini Vieira Ramos0Maria de Fátima Marques Vieira1Lucas Galhardo Pimenta Tienne2Vinícius de Oliveira Aguiar3Corresponding author.; Instituto de Macromoléculas Professora Eloisa Mano, Universidade Federal do Rio de Janeiro, Avenida Horácio Macedo, 2030-Centro de Tecnologia, Bloco J, Ilha do Fundão, Rio de Janeiro, RJ, 21941 598, BrazilInstituto de Macromoléculas Professora Eloisa Mano, Universidade Federal do Rio de Janeiro, Avenida Horácio Macedo, 2030-Centro de Tecnologia, Bloco J, Ilha do Fundão, Rio de Janeiro, RJ, 21941 598, BrazilInstituto de Macromoléculas Professora Eloisa Mano, Universidade Federal do Rio de Janeiro, Avenida Horácio Macedo, 2030-Centro de Tecnologia, Bloco J, Ilha do Fundão, Rio de Janeiro, RJ, 21941 598, BrazilInstituto de Macromoléculas Professora Eloisa Mano, Universidade Federal do Rio de Janeiro, Avenida Horácio Macedo, 2030-Centro de Tecnologia, Bloco J, Ilha do Fundão, Rio de Janeiro, RJ, 21941 598, BrazilThis study concerns the synthesis of geopolymeric foams from blast furnace slags, comparing the results of the produced materials using 8 M alkaline solutions of sodium metasilicate (Na2SiO3) or sodium hydroxide (NaOH) as geopolymerization agents with 1.4 and 1.6 g/L (solid/liquid) ratios of slags. Blast furnace slags (BFS) were added to each alkali-activated solution reaction, maintaining under constant stirring during periods of 4, 20, and 24 h. Posteriorly, hydrogen peroxide 50% was inserted as a foaming agent. This method used room temperature (25 °C) to the production of the foams. The influence of the mixture parameters on the resultant porosity was observed through the characterization by X-ray fluorescence (XRF), Fourier transformed infrared (FTIR), X-ray diffraction (XRD), thermogravimetry (TG/DTG) and scanning electron microscopy (FEG-SEM) analyses. Geopolymeric foams (GF) were obtained with different characteristics of porosity, thermal stability, crystallinity, and interconnection between porous. Dimensional stability was observed on the samples of geopolymer of blast furnace slags with metasilicate. According to characteristics of the developed samples, they can be investigated as CO2 and other gases absorber, or retainer of harmful metals.http://www.sciencedirect.com/science/article/pii/S2238785420316264Blast furnace slagGeopolymerFoamSodium metasilicateGasesHarmful metals |
| spellingShingle | Flávio J.H. Tommasini Vieira Ramos Maria de Fátima Marques Vieira Lucas Galhardo Pimenta Tienne Vinícius de Oliveira Aguiar Evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicate Journal of Materials Research and Technology Blast furnace slag Geopolymer Foam Sodium metasilicate Gases Harmful metals |
| title | Evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicate |
| title_full | Evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicate |
| title_fullStr | Evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicate |
| title_full_unstemmed | Evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicate |
| title_short | Evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicate |
| title_sort | evaluation and characterization of geopolymer foams synthesized from blast furnace with sodium metasilicate |
| topic | Blast furnace slag Geopolymer Foam Sodium metasilicate Gases Harmful metals |
| url | http://www.sciencedirect.com/science/article/pii/S2238785420316264 |
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