Alkali-excited gel structure and compositions evolution in geopolymers synthesized from the spent FCC catalyst and steel slag
The effect of the alkaline activation process, especially the SiO2/Na2O molar ratio (Ms) in the prepared alkaline activator, on the geopolymer materials prepared using the spent fluid catalytic cracking (FCC) catalyst and steel slag as raw materials is investigated in this study. The results indicat...
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| Format: | Article |
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Elsevier
2022-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422015964 |
| _version_ | 1811292836693278720 |
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| author | Huanyu He Hongling Liu Yang Guo Yang Li Peng Li Hua Zhang Taotao Hu Hongwei Ni |
| author_facet | Huanyu He Hongling Liu Yang Guo Yang Li Peng Li Hua Zhang Taotao Hu Hongwei Ni |
| author_sort | Huanyu He |
| collection | DOAJ |
| description | The effect of the alkaline activation process, especially the SiO2/Na2O molar ratio (Ms) in the prepared alkaline activator, on the geopolymer materials prepared using the spent fluid catalytic cracking (FCC) catalyst and steel slag as raw materials is investigated in this study. The results indicate that the compressive strength of prepared geopolymers has been greatly affected by the alkaline environment. The compressive strength of obtained samples is improved obviously in the strong alkaline environment. Meanwhile, the number of amorphous gels in the prepared geopolymers increased with Ms decreasing. It is conducive for the silicon-oxo-aluminate species in the oligomers to polymerize into polymers with 3D polymeric structures, which would lead to the surface of as-prepared samples becoming smoother and the structure becoming denser. Moreover, the strong alkaline environment is beneficial for Ca2+ to involve in the geopolymerization reaction and form the N(C)ASH gel, which can further enhance the compressive strength of the prepared geopolymer. |
| first_indexed | 2024-04-13T04:52:32Z |
| format | Article |
| id | doaj.art-702512e643a542c8a15ceb1b4baf8df7 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-13T04:52:32Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-702512e643a542c8a15ceb1b4baf8df72022-12-22T03:01:38ZengElsevierJournal of Materials Research and Technology2238-78542022-11-012126632671Alkali-excited gel structure and compositions evolution in geopolymers synthesized from the spent FCC catalyst and steel slagHuanyu He0Hongling Liu1Yang Guo2Yang Li3Peng Li4Hua Zhang5Taotao Hu6Hongwei Ni7The State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, ChinaGEM Green Industry (Wuhan) Innovation Research Institute, Wuhan, 431400, ChinaHuangshi Product Quality Supervision and Inspection Institute, Huangshi, 435000, Hubei, ChinaThe State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, China; Corresponding author.Shagang School of Iron and Steel, Soochow University, Suzhou, 215021, China; Corresponding author.The State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, China; Corresponding author.The effect of the alkaline activation process, especially the SiO2/Na2O molar ratio (Ms) in the prepared alkaline activator, on the geopolymer materials prepared using the spent fluid catalytic cracking (FCC) catalyst and steel slag as raw materials is investigated in this study. The results indicate that the compressive strength of prepared geopolymers has been greatly affected by the alkaline environment. The compressive strength of obtained samples is improved obviously in the strong alkaline environment. Meanwhile, the number of amorphous gels in the prepared geopolymers increased with Ms decreasing. It is conducive for the silicon-oxo-aluminate species in the oligomers to polymerize into polymers with 3D polymeric structures, which would lead to the surface of as-prepared samples becoming smoother and the structure becoming denser. Moreover, the strong alkaline environment is beneficial for Ca2+ to involve in the geopolymerization reaction and form the N(C)ASH gel, which can further enhance the compressive strength of the prepared geopolymer.http://www.sciencedirect.com/science/article/pii/S2238785422015964Alkaline environmentSiO2/Na2O molar ratioCompressive strengthN(C)ASH gel |
| spellingShingle | Huanyu He Hongling Liu Yang Guo Yang Li Peng Li Hua Zhang Taotao Hu Hongwei Ni Alkali-excited gel structure and compositions evolution in geopolymers synthesized from the spent FCC catalyst and steel slag Journal of Materials Research and Technology Alkaline environment SiO2/Na2O molar ratio Compressive strength N(C)ASH gel |
| title | Alkali-excited gel structure and compositions evolution in geopolymers synthesized from the spent FCC catalyst and steel slag |
| title_full | Alkali-excited gel structure and compositions evolution in geopolymers synthesized from the spent FCC catalyst and steel slag |
| title_fullStr | Alkali-excited gel structure and compositions evolution in geopolymers synthesized from the spent FCC catalyst and steel slag |
| title_full_unstemmed | Alkali-excited gel structure and compositions evolution in geopolymers synthesized from the spent FCC catalyst and steel slag |
| title_short | Alkali-excited gel structure and compositions evolution in geopolymers synthesized from the spent FCC catalyst and steel slag |
| title_sort | alkali excited gel structure and compositions evolution in geopolymers synthesized from the spent fcc catalyst and steel slag |
| topic | Alkaline environment SiO2/Na2O molar ratio Compressive strength N(C)ASH gel |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422015964 |
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