Microstructure and mechanical properties of geopolymers with different dolomitic lime contents
Abstract This study investigated the effect of dolomitic lime incorporation on the microstructure and mechanical properties of metakaolin-based geopolymers activated by alkaline solution. Five geopolymer mixtures were prepared with the addition of 0.0%, 2.5%, 5.0%, 7.5%, and 10.0% dolomitic lime. T...
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| Format: | Article |
| Language: | English |
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Instituto Brasileiro do Concreto (IBRACON)
2024-03-01
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| Series: | Revista IBRACON de Estruturas e Materiais |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952025000100200&tlng=en |
| _version_ | 1827289526509240320 |
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| author | Allan Guimarães Borçato Neusa Aparecida Munhak Beltrame Tassiane Apolinário de Oliveira Ronaldo Alves de Medeiros-Junior |
| author_facet | Allan Guimarães Borçato Neusa Aparecida Munhak Beltrame Tassiane Apolinário de Oliveira Ronaldo Alves de Medeiros-Junior |
| author_sort | Allan Guimarães Borçato |
| collection | DOAJ |
| description | Abstract This study investigated the effect of dolomitic lime incorporation on the microstructure and mechanical properties of metakaolin-based geopolymers activated by alkaline solution. Five geopolymer mixtures were prepared with the addition of 0.0%, 2.5%, 5.0%, 7.5%, and 10.0% dolomitic lime. The microstructure of the geopolymers was evaluated by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction analyses (XRD). The compressive strength of the mixtures ranged between 53.2 and 63.0 MPa after 28 days of ambient curing. SEM/EDS analyses showed that the main phases formed were the N-A-S-H gel together with the C-A-S-H and N-M-A-S-H gels in the mixtures with dolomitic lime. In summary, the results showed that the incorporation of dolomitic lime can significantly improve the microstructure and properties of geopolymers. |
| first_indexed | 2024-04-24T11:51:00Z |
| format | Article |
| id | doaj.art-390650e8e81f479b85f6322e497b3c7b |
| institution | Directory Open Access Journal |
| issn | 1983-4195 |
| language | English |
| last_indexed | 2024-04-24T11:51:00Z |
| publishDate | 2024-03-01 |
| publisher | Instituto Brasileiro do Concreto (IBRACON) |
| record_format | Article |
| series | Revista IBRACON de Estruturas e Materiais |
| spelling | doaj.art-390650e8e81f479b85f6322e497b3c7b2024-04-09T07:40:59ZengInstituto Brasileiro do Concreto (IBRACON)Revista IBRACON de Estruturas e Materiais1983-41952024-03-0118110.1590/s1983-41952025000100001Microstructure and mechanical properties of geopolymers with different dolomitic lime contentsAllan Guimarães Borçatohttps://orcid.org/0000-0003-3822-2859Neusa Aparecida Munhak Beltramehttps://orcid.org/0000-0001-7240-4344Tassiane Apolinário de Oliveirahttps://orcid.org/0000-0002-7269-9186Ronaldo Alves de Medeiros-Juniorhttps://orcid.org/0000-0003-4879-4869 Abstract This study investigated the effect of dolomitic lime incorporation on the microstructure and mechanical properties of metakaolin-based geopolymers activated by alkaline solution. Five geopolymer mixtures were prepared with the addition of 0.0%, 2.5%, 5.0%, 7.5%, and 10.0% dolomitic lime. The microstructure of the geopolymers was evaluated by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction analyses (XRD). The compressive strength of the mixtures ranged between 53.2 and 63.0 MPa after 28 days of ambient curing. SEM/EDS analyses showed that the main phases formed were the N-A-S-H gel together with the C-A-S-H and N-M-A-S-H gels in the mixtures with dolomitic lime. In summary, the results showed that the incorporation of dolomitic lime can significantly improve the microstructure and properties of geopolymers.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952025000100200&tlng=engeopolymermetakaolindolomitic limemagnesium hydroxidecalcium hydroxide |
| spellingShingle | Allan Guimarães Borçato Neusa Aparecida Munhak Beltrame Tassiane Apolinário de Oliveira Ronaldo Alves de Medeiros-Junior Microstructure and mechanical properties of geopolymers with different dolomitic lime contents Revista IBRACON de Estruturas e Materiais geopolymer metakaolin dolomitic lime magnesium hydroxide calcium hydroxide |
| title | Microstructure and mechanical properties of geopolymers with different dolomitic lime contents |
| title_full | Microstructure and mechanical properties of geopolymers with different dolomitic lime contents |
| title_fullStr | Microstructure and mechanical properties of geopolymers with different dolomitic lime contents |
| title_full_unstemmed | Microstructure and mechanical properties of geopolymers with different dolomitic lime contents |
| title_short | Microstructure and mechanical properties of geopolymers with different dolomitic lime contents |
| title_sort | microstructure and mechanical properties of geopolymers with different dolomitic lime contents |
| topic | geopolymer metakaolin dolomitic lime magnesium hydroxide calcium hydroxide |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952025000100200&tlng=en |
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